Added the function to change pin's icon according to power generation
value. The more energy it generates, the yellower the pin is.
deleted a debug function that I forgot to delete while cleaning up.
Added comments.
Merge pull request #78 from prashantchhabra89/jQueryFunctions

J query functions
Add the icons for pins
Merge remote-tracking branch 'origin/master' into multiplePinIcons

Conflicts:
	PowerPlanner/war/Scripts/marker_helper.js
Merge pull request #80 from prashantchhabra89/multiplePinIcons

Multiple pin icons
Added equation variable definitions and their images 
Modify hydro and wind power calc equation image. Equations were
incorrect
PDF export button now is just Export which have PDF and copy URL in the
panel
Added Export to URL UI in export panel