Fix invalid method call for strip_trailing_seperator in configuration
Added 'text-transform:capitalize' to 'hide-text' mixin
Uses :filesystem_importer sass option, when provided, to create importers

Sass allows the user to overwrite the default importer using :filesystem_importer option. This makes Compass respect that option when used.
Color grid background with gradients for 0 gutters grids
Added new Flexbox mixins from https://gist.github.com/cimmanon/4461470
Added import for new Flexbox mixins
Added tests for Flexbox
Converted prefix support variables to match the new style
Corrected behavior for  argument on  mixin
Reorganized comments & default variables
Fixed supported prefixes order and function call (was using incorrect name)
Update configuration-reference.markdown

The default environment is `development` according [default_environment()](https://github.com/chriseppstein/compass/blob/master/lib/compass/configuration/defaults.rb#L25).
Adjusted function name and added missing commas
Update urls.haml

Typos. Remove extranous "the" in three places.
Merge pull request #1224 from CarlRevell/stable

Update urls.haml to fix small typo
fix custom watch function

block as parameter need '&'
removed duplication in sprite sass function module
removed old sprite_image function
removed test for sprite_image
updated changlog