Build: Upgrade to grunt-jquery-content 0.14.0
(cherry picked from commit 778aae9b3ad28071fd6d46cc8858746a36f6a2e2)
Build: Replace grunt-clean with rimraf
(cherry picked from commit 039cf31c6cdcbedd94e343f7115b6ee7ce4d030c)
Build: Remove unused tasks
(cherry picked from commit af84946b32d4026323db66bad361a893e78e7a2b)
Build: Remove dates from copyright notice
(cherry picked from commit 9cb35b02680ed9581ebf46c75c9b956b9bfdaccb)
README: Cleanup
(cherry picked from commit 57499a85c2058b2ec481ca6411ae3d91bf0fbaae)

Conflicts:

	README.md
Build: Remove manifest task

This task hasn't been used since 1.11.0 was released.
(cherry picked from commit 0f22d2ac84ee838994da43874e176554879fdb21)
Build: Upgrade to Grunt 0.4.5

* Upgrade to grunt-check-modules 0.2.0
* Upgrade to grunt-jquery-content 1.0.0
(cherry picked from commit 652f400ee8c202cb469dfed631c32a6432d3aa32)
Build: package.json cleanup
(cherry picked from commit a6a9b663c11830ebb1875783a25dd748b9c6bbed)
Build: Upgrade to grunt-jquery-content 2.0.0
(cherry picked from commit 0cad54d976ac6e9c20788a089817a5dfde3b05e5)