Improved NOTES for 1.5.
Updated NOTES file per code review.
Use $(COFFEE) instead of coffee
Add correct dependencies to the list of phony targets
Tweak build rules for precompiled web assets
Fix `make support`

Issue 641
Merge review 548 by @mlucy

Closes #813
Merge remote-tracking branch 'origin/v1.5.x_improved_notes' into HEAD

Conflicts:
	NOTES
Change release date

Travis: noci
Prepare for v1.5.0 release