Only append bar to the first body element

In the case where one is using an svg diagram with a foreign object element which contains it's own self-contained html DOM, the progress bar was being applied to all of them. Resulting in many loading bars.
This patch restricts the selector to only find one element, which will the first.
Merge pull request #108 from osbornebrook/patch-1

Only append bar to the first body element
we want the ability to customize also the progress bar
Merge pull request #111 from jervert/master

ability to customize also the progress bar
bump version 0.6.0
Returning XHR request with cfpLoadingBar:loaded
Missed build/ directory
Merge pull request #128 from timmckenzie/master

Returning XHR request with cfpLoadingBar:loaded
Merge branch 'master' of github.com:chieffancypants/angular-loading-bar

* 'master' of github.com:chieffancypants/angular-loading-bar:
  Missed build/ directory
  Returning XHR request with cfpLoadingBar:loaded
  bump version 0.6.0
  we want the ability to customize also the progress bar
  Only append bar to the first body element