Update references to twbs
Default $bootstrap-sass-asset-helper to true only if asset helper is
defined.
Thanks @cimmanon! See also: http://stackoverflow.com/questions/20706908/test-whether-a-sass-function-is-defined
bower note
rake convert
fix converter version
improve mixin discovery
convert
Minor refactorings and rake less_to_scss

less_to_scss:

    $ echo '.p { #gradient > .horizontal(red,blue) }' | rake less_to_scss[master]
    .p { @include gradient-horizontal(red,blue) }
converter: cleanup, improve asset-helper variable comment
rake convert
First attempt at a bower.json
In @import use paths relative to the file.

This is to avoid relying on modified Sass load path.
File directory is present in load path by default
remove unused error class
bower-compatible version format (patchlevel)
Update license to match upstream
update gemspec and bower
Tasks to update rubygem and bower versions

Unfortunately, rubygems uses a format different from bower for semver
patchlevel (3.0.3.1 vs 3.0.3-1)
For bower, use a semver tag
fix
Update README