Allow developers to upload sources of an Addon version (bug 540028)
Commit from Mozilla Verbatim by user a.polivanchuk@outlook.com.: 486 of 3289 strings translated (0 fuzzy).
Merge pull request #139 from yohanboniface/bug-540028-add-version-source

Allow developers to upload sources of an Addon version (bug 540028)
Do not serve files views from STATIC_URL (bug 1013865)
Merge pull request #181 from yohanboniface/bug-1013865-staticfiles-fixes

Do not serve files views from STATIC_URL (bug 1013865)
we need a STATIC_URL
proper tests for XSS
no more build-assets.sh (merged into build.sh), use memcache, set NETAPP_STORAGE...
proper use of the stdlib + remove temporary folder when done with it