Added Responsive Grid Attribute
Cleaned up and changed default value
Fit guidelines
Added variable
update contributing text
Merge pull request #567 from mhartington/Responsive-Grid

Responsive grid
chore(build): escape slash in site-publish script

Closes #574
chore(travis): remove reset from site script
feat(grid): Added classes, variables and mixins for responsive grid options
fix(list): css: don't make last .list on page have margin-bottom

Addresses #425
test(ionicContent): mock scrollView.{scrollTo,getValues}
fix(header): Header icon button css fix for Safari, closes #576
feat($ionicScrollDelegate): add scrollTo(left,top,animate) to delegate

Also moves $ionicScrollDelegate.register to $ionicScroll controller,
and makes `<scroll>` directive be registered with $ionicScrollDelegate.
fix(scroll): `<scroll>` is now registered with $ionicScrollDelegate

This is just a whitespace change with a commit attached to it so that we
can have the fix appear in the changelog.

The actual changes are in c119498d1bdfe9c5ec0d7453fce8f9a18227977c.
fix(refresher): make refresher css not create gap at end of list
fix(scrollView): start scroll again if it stops beyond boundaries

Addresses #482
fix(sideMenuContent): make dragContent default to true
chore(): uncomment commented line
a:hover cursor
fix active class for list items and complex items, closes #498