Initial commit for v2.0.0
[ref #33] Fix dropdown compatibility in IE8
Rename `.header` to `.dropdown-header`
Add comment before `.table`
Remove default styles for form and put inside of a `.form` class
Declare breakpoints as a map instead of separate variables
Add better comments to each mixin, as well as first draft for `.responsive()` mixin
Fix `.push` and `.pull` mixins
Setting up gulpfile and dependencies
Fixes some whitespaces
Adds personal information to README
Merge pull request #34 from filipelinhares/improvements

Update `gulpfile` and dependencies
Move heading sizes to variables file
Move font-size variables out of the `variables.scss` file
Add space between variable and return value
Remove `container()` mixin and refactor `font-size()` mixin
Use the new `.responsive()` mixin
Comment reformatting
Remove button border styles
Remove `!important` from `.bg-*` classes