Makefile can compiles less files

Change-Id: I277ef115b39831fef124f8a718532410a9f20ede
Converting CSS to LESS

Change-Id: I3802fd64d9462ada9700d8d16a95ff83ffe6b3f7
Fixing some LESS syntax errors

Change-Id: I197a3061feb01adf8c0d2b54799a19b94be5eb39
Adding all the CSS files in the .gitignore except ones coming from libraries which are not compiled from LESS

Change-Id: I427889750275ae77bd4dcca3e37073a99603d057
Merge "Makefile can compiles less files" into 5281_write_stylesheets_in_LESS_format
Merge "Converting CSS to LESS" into 5281_write_stylesheets_in_LESS_format
Merge "Fixing some LESS syntax errors" into 5281_write_stylesheets_in_LESS_format
Merge "Adding all the CSS files in the .gitignore except ones coming from libraries which are not compiled from LESS" into 5281_write_stylesheets_in_LESS_format
UI Fix: fix cardwall backlog items column borders problem

Change-Id: I5f0dbd11d57913e72af7ca3c61220676ad1db615
Generate css from less on package building

Change-Id: I1a64a62b6ea0d71ca1f503711e2b3c349eb44ac7
Normalise LESS license headers + Enhance makefile regexp

Change-Id: I08c796a2661bd9f2f44f043881b099a2d9abfb8c
Merge "UI Fix: fix cardwall backlog items column borders problem" into 5281_write_stylesheets_in_LESS_format
Merge "Generate css from less on package building" into 5281_write_stylesheets_in_LESS_format
FIX Makefile: exclude .DS_Store files

Change-Id: I5e617f78540c2cfb740e8f38039260a7a669542d
Merge "Normalise LESS license headers + Enhance makefile regexp" into 5281_write_stylesheets_in_LESS_format
Merge "FIX Makefile: exclude .DS_Store files" into 5281_write_stylesheets_in_LESS_format
Merge remote-tracking branch 'gerrit/5281_write_stylesheets_in_LESS_format' into stable

* gerrit/5281_write_stylesheets_in_LESS_format:
  FIX Makefile: exclude .DS_Store files
  Normalise LESS license headers + Enhance makefile regexp
  Generate css from less on package building
  UI Fix: fix cardwall backlog items column borders problem
  Adding all the CSS files in the .gitignore except ones coming from libraries which are not compiled from LESS
  Fixing some LESS syntax errors
  Converting CSS to LESS
  Makefile can compiles less files

Conflicts:
	Makefile
This is Tuleap 6.6.99.11

Change-Id: If682a2754df35ef69c4478bf7f3ae8f3094453b9