Merged in dev (pull request #1)

changed readme
another readme update
exercise details image adjustment
working on create exercise page
round 2 on create new exercise logic - metadata
image changes and exercise create work
added bootstrap 3.0 RC1 - ported header, footer, basic responsive widths
bootstrap 3.0 RC2 changes - forms
last bootstrap 3.0 changes
create exercise responsive layout
form directive changes, exercise creation changes
lots of create/edit excercise changes
new tabs directive without new scope, change form directive, create exercise page work
refactored user role logic, added update metadata functionality
fix to allow create exercise then immediately edit it's metadata
create exercise now routes you to edit page
split into exercise-create & exercise-edit controllers
using RESOLVE router method for exercise-edit controller
first round of adding images
changing the default tab back