DOCS: version and changelog -> 1.78
DOCS: updated URLS for Static Comp and for fetching installer files

installs now at sourceforge
Static Component is in standard docs site
ENH: psychopyApp.py should be just a launcher with class code stored elsewhere

This is important for the mac app bundle which stores the launcher script
in a diff place to the class code and the launcher script isnt updated by
the auto-updater. That can cause a crash if the launcher and class code
differ.
Merge branch 'master' of github.com:psychopy/psychopy

Conflicts:
	docs/source/changelog.rst