Bump VERSION to 4.0.0.alpha.
Merge branch 'stable'
cleaning up some of the documentation of at-root with a slightly more complex example. sass/sass#1462
Merge pull request #1463 from hcatlin/at-root-docs

At-Root Documentation Fix
typo fixes
Merge pull request #1506 from vlajos/typofixes20141102

typo fixes
Don't add complex selectors to :not() if that would break browsers.

Closes #1505
Fix GitHub tag links, and add missing ones.
Merge pull request #1523 from zessx/patch-1

Fix GitHub tag links, and add missing ones.
Merge branch 'stable'

Conflicts:
	VERSION
Merge remote-tracking branch 'origin/master'
Add a deprecation warning for using units in rgba/hsla alpha parameters.

See #1525
Fix a couple test errors.
Bump VERSION to 3.4.8.
Fix the docs for random().

Closes #1548
Merge branch 'stable'
Merge branch 'master' of github.com:sass/sass
Better unify selectors containing unique simple selectors.

Closes #1545
WIP