Add a lint indicator that replaces Brackets lint indicator

Removes default Brackets lint status indicator.
Replaces the `errorIndicator` with this `lintIndicator`.

See #61 for more detail on the reasons for this. 
I saw this in a previous PR as well, but templates variables should be normal camel casing as other variables.  E.g. `var dialogTemplate = ...`  Also keeping require statements up on top, just below the brackets.getModule makes it easier to quickly see where all the imports are.