Merge pull request #51 from desheikh/master

use rails 4 syntax for collection inputs
Update CHANGELOG.md

Add info of PR #51
Update CHANGELOG.md

List bugfix for issue #58
renaming :left and :right options to label_col and control_col (closes #53)
updating changelog for #53
Change form option name of :style to :layout
Merge pull request #64 from OurHealth/form-layout

Change form option name of :style to :layout
updating CHANGELOG for #64