Updating Compass dependency so it can work with 1.0.0.alpha releases and bower

[timkelty]

Bower would not install because there was no tag:

$ bower install sass-toolkit
bower not-cached    git://github.com/Team-Sass/color-schemer.git#>=0.2.3
bower resolve       git://github.com/Team-Sass/color-schemer.git#>=0.2.3
bower cached        git://github.com/Snugug/Sassy-Strings.git#1.0.0
bower validate      1.0.0 against git://github.com/Snugug/Sassy-Strings.git#*
bower cached        git://github.com/Team-Sass/breakpoint.git#2.3.0
bower validate      2.3.0 against git://github.com/Team-Sass/breakpoint.git#>=2.0.2
bower cached        git://github.com/Team-Sass/toolkit.git#1.3.8
bower validate      1.3.8 against git://github.com/Team-Sass/toolkit.git#*
bower ENORESTARGET  No tag found that was able to satisfy >=0.2.3

at-import/toolkit#46

[timkelty]

Using Bundler with Compass 1.0.0.alpha.3 give you:

Bundler could not find compatible versions for gem "compass":
  In Gemfile:
    toolkit (>= 0) ruby depends on
      compass (~> 0.12) ruby

    compass (1.0.0.alpha.13)

Due to the ~> and not >=