changes all plural :notices to singular :notice to standardize
fix module doc: Phoenix.Controller.Flash no longer automatically plugged in controllers
Merge pull request #377 from lancehalvorsen/fix-flash-module-doc-re-aliasing

Fix Flash Module Doc
Merge pull request #378 from lancehalvorsen/flash-module-teeny-typo

Fixes Teeny Typo in Flash Module pop_all Function Doc
Application.app_dir for template path in new task