Updated configs to use WEBDIR & LIBDIR instead of hard coded htdocs and lib.
Upgraded build pack utils to #ca17602.
Upgraded build pack utils to #43a6d1e.
Upgraded build pack utils to #e119e25.
Modifications to support using configurable WEBDIR and LIBDIR.
Added tests for compiling with custom web and lib dirs.
Squashed bug when platform block is a list / empty.
Fixed broken test.  Data changed.
Modifed composer extension to support customized vendor and bin directories.
Rewrote detect method so the search for composer.json & composer.lock is broader.  Added tests to confirm it works.
Updated features listed in README.
Updated docs with changes from adding support for Composer.
Updated dev docs.