Added an OpenSeadragon.version property
Modified OpenSeadragon.version property

Let grunt do more of the work!
OpenSeadragon.version property change

grunt property name changed to be more OpenSeadragon-specific
Added radix to parseInt()s
Added @since doclet tag to OpenSeadragon.version
Add jshint ignore directives to version
Merge pull request #292 from msalsbery/versioning

Added an OpenSeadragon.version property