Remove google closure, and start reworking the build system

Squashed commit of the following:

commit 446aae2afd089c28abd1d03a5fd20d4735837e16
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:50:17 2013 -0700

    stage-dir doesn't need to be cleaned

      Since everything goes into a common build tree now, cleaning just
    involves removing the entire build tree.

commit d8f531ddf8ee1406ec915502c28dc0eb3912d0ee
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:47:10 2013 -0700

    Switch to placing build artifacts in a build tree

commit 9eedeec8d6a1012b1b7e466120260276b1e952d4
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:35:01 2013 -0700

    Remove the closure_compiler and closure_linter

commit 5784158cf2cd55f0ffd01147ae014379ecc857fd
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:34:27 2013 -0700

    Move the scripts in build to tools/bin

commit 64a6a53ea0fd5e299e9d17c0e4f8fedf305272dc
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:27:55 2013 -0700

    Build jsdoc

      Also, remove the old Makefiles that were in doc, as they're not necessary
    anymore.

commit 1ef0d9e39cd4a24807ee6ca956fbc627fb851b9d
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:18:59 2013 -0700

    Conditionally build the manual

commit c326c58059e0d5035edecfd6261ee42797c49c2c
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:13:31 2013 -0700

    Get the html manual building again

commit 480fa132ffb0562eb3f61d45d79d3315b1d3cc29
Author: Trevor Elliott <trevor@galois.com>
Date:   Thu May 16 11:13:01 2013 -0700

    Move doc specific .gitignore stuff to doc/.gitignore

commit 8c108d4e0df848839bcd6b4c22d623053f590e95
Author: Trevor Elliott <trevor@galois.com>
Date:   Wed May 15 10:42:41 2013 -0700

    Fix some path inconsistencies in the contexts build.mk

commit ee53404be09cf26983365374da84ade564b92926
Author: Trevor Elliott <trevor@galois.com>
Date:   Wed May 15 10:37:40 2013 -0700

    Preliminary build system changes

     * Chrome extension builds, but there are problems

commit 474c6b88190787aeffd960ffb5855d31770e7141
Author: Trevor Elliott <trevor@galois.com>
Date:   Mon May 13 19:06:31 2013 -0700

    Remove the closure toolkit

1 files changed, 46 insertions, 47 deletions

diff --git a/Makefile b/Makefile
index 89f9ffd..8b465ec 100644
--- a/Makefile
+++ b/Makefile
@@ -17,74 +17,73 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-REPO_ROOT=.
-CHROME_EXTDIR=contexts
-FF_EXTDIR=contexts
-TEST_RUNNER_DIR=testrunner
-HEADLESS_DIR=headless
-RSTESTER_DIR=rsTester
-DOC_DIR=doc
 
-MVN_EXE=`which mvn`
 
-define profile
-.PHONY: profile-$1
-profile-$1: $(REPO_ROOT)/profiles/$1/.token
+# Entry Point ##################################################################
 
-$(REPO_ROOT)/profiles/$1/.token: $(REPO_ROOT)/profiles/$1.tar
-	$(MAKE) -C $(REPO_ROOT)/profiles $1
+.PHONY: all
+all:
 
-.PHONY: clean-profile-$1
-clean-profile-$1:
-	$(MAKE) -C $(REPO_ROOT)/profiles clean-$1
+.PHONY: unpack
+unpack:
 
-clean: clean-profile-$1
-endef
+.PHONY: clean
+clean::
 
-# package/install various maven sub-projects
-define pkg
-.PHONY: pkg-$1
-pkg-$1:
-	cd $1; xvfb-run -a $(MVN_EXE) install
+# Utilities ####################################################################
 
-endef
+topdir := $(CURDIR)
+path   := .
 
-MVN_TEST_CMD=xvfb-run -a $(MVN_EXE) test
+include mk/util.mk
+include mk/subdir.mk
 
-all: chromeExtension
 
-ffExtension:
-	@make -C $(FF_EXTDIR)
-chromeExtension:
-	@make -C $(CHROME_EXTDIR)
+# Build Directory Staging ######################################################
 
+build-dir := $(topdir)/build
 
-cleanOSS:
-	@make -C $(FF_EXTDIR) clean
-	@make -C $(CHROME_EXTDIR) clean
-	@make -C $(DOC_DIR) clean
+$(build-dir):
+	$(call cmd,mkdir)
 
+clean::
+	$(RM) -r $(build-dir)
 
-$(eval $(call profile,firefox))
 
-$(eval $(call profile,chrome))
+# Subdirs ######################################################################
 
-$(eval $(call pkg,rsTester))
+$(eval $(call subdir,contexts))
+$(eval $(call subdir,profiles))
+$(eval $(call subdir,doc))
+
+
+# Maven Packages ###############################################################
+
+# Don't try to run any of this if maven isn't installed
+MVN_EXE := $(shell which --skip-alias $i mvn 2>/dev/null)
+ifneq "$(MVN_EXE)" ""
 
+# package/install various maven sub-projects
+MVN_TEST_CMD := xvfb-run -a $(MVN_EXE) test
+
+define pkg
+.PHONY: pkg-$1
+pkg-$1:
+	cd $1 && xvfb-run -a $(MVN_EXE) install
+endef
+
+$(eval $(call pkg,rsTester))
 $(eval $(call pkg,headless))
 
+TEST_RUNNER_DIR := testrunner
+HEADLESS_DIR    := headless
+RSTESTER_DIR    := rsTester
 
 test: chromeExtension profile-chrome profile-firefox ffExtension pkg-rsTester
 	cd $(TEST_RUNNER_DIR) && $(MVN_TEST_CMD)
-	cd $(RSTESTER_DIR) && $(MVN_TEST_CMD)
-	cd $(HEADLESS_DIR) && $(MVN_TEST_CMD)
-
-.PHONY: doc
-doc: doc/jsdoc doc/manual
-doc/jsdoc:
-	@make -C $(DOC_DIR)
+	cd $(RSTESTER_DIR)    && $(MVN_TEST_CMD)
+	cd $(HEADLESS_DIR)    && $(MVN_TEST_CMD)
 
-doc/manual:
-	@make -C $(DOC_DIR) man
+endif
 
-clean: cleanOSS
+# Documentation ################################################################