The configure phase of emscriptenStdenv exspects an ./autogen.sh script,
which is anoying when this step is not needed. Good example is
emscriptenPackages.zlib which needs to override configurePhase.
* trying to build emscriptenPackages not all fail
* reading the console.log it turns out python executable is not in place and that is why emconfigure didnt work
* backup commit
* much more targets are compiling now
* added common revisioning
* revision bump to 1.37.36 (not tested)
* fixed xmllint
* forcing unit testing, will implement the tests after i get home
* json_c test working
* added tests
* tiny fixes
* added documentation