Minor upgrade to the testpage to reflect the Staging ENV name change
testpage refactored
Few additional comments
4020: Change CheckGroup bric to ProtoCheckGroup

(mjl squashed changes from Brandon's original 4020 branch)
4020: new CheckGroup bric

(mjl squashed changes from Brandon's original 4020 branch)
segregate styling on font awesome i tags from standard i tags
changes to htmlBricTemplate (comments, add some methods)
change KeyedAnswer type to not allow null

In the places where it is desired to be null when it is used change the type to ?KeyedAnswer
35: moved the number formatting method out of RadioGroup to utility function pearson.brix.utils.getIndexDisplayFn
adding *=' icon-' rules
35: new CheckGroup bric
121: IMultiChoicePresenter interface and McpCheckGroup bric implementing it.

This is preliminary work for the BRIX-121 MultiSelectQuestion bric story and will likely be enhanced once that story is really underway.
37: adding variable size to video.  IInjectable interface
Merge pull request #92 in BRIX/brixclient from BRIX_239_enlarged_italics to master

# By Brandon Stow
# Via Brandon Stow
* commit 'd8aff900e95170d078a22bf47de5eadd10b8e488':
  adding *=' icon-' rules
  segregate styling on font awesome i tags from standard i tags