Remove build dir
Merge pull request #66 from geoadmin/dev_remove-build-dir

Remove build dir
Tentative of lib concatenation in order to avoid multiple http requests
Put lib.js in app-prod since it's for production only
Create a complete build.js
Move PHONY targets together
Use $^ in Makefile
Remove Makefile target .build-artefacts/lib.timestamp

No longer needed now that we concatenate the js files into build.js.
Remove unused APP_LIB_FILES Makefile var
Generate app.js into .build-artefacts

app.js is now an intermediary file, and we no longer need to have it in app-prod
Reorg Makefile rules
Merge pull request #67 from geoadmin/dev_catlib

Lib concatenation
Use non-minified js for tests
Change Karma basePath

This will be needed for using Karma's html2js preprocessor.
Change script load order in dev index.html
Add non-minified version of jQuery
Use non-minified jQuery in dev index.html
Use non-minified jQuery in tests
Merge pull request #68 from geoadmin/dev_test-with-dev

Non-minified js for tests
Merge pull request #69 from geoadmin/dev_non-minified-jquery

Use non-minified jQuery for dev