Make default params type to an object instead of null
Set up development flow with grunt and fix coverage report
Remove support for context.isFunction which would flag a function as originating from the context when true and as a dust compiled function when false.
Merge pull request #424 from kate2753/gruntDev

Set up dev flow with grunt and fix coverage report
Merge pull request #447 from prashn64/remove-isFunction-fixed

deprecate the internal property context.isFunction. this is no longer needed.
Merge pull request #441 from prashn64/object-params

Make default params type to an object instead of null