Bugfix for #664, relase publish and smartsheets generate optpng errors.
Merge branch 'v1.1' into bugfix/1.1/#664_release_publish_optipng

Conflicts:
	SpriteBuilder/ccBuilder/CCBPublisher.m
	SpriteBuilder/ccBuilder/PublishImageOperation.m
Bugfix for github issue #672.
File modifcation date used to test for changes got out of sync after introduction of intermediatefilelookup.plist files.
Changed publishing status update message for spritesheets, now without plist extension for current filename.
Modification dates of directories needed to be ignored to work properly with intermediate filelookups.
Merge pull request #665 from NickyWeber/bugfix/1.1/#664_release_publish_optipng

Bugfix/1.1/#664 release publish optipng
Merge pull request #675 from NickyWeber/bugfix/1.1/#672_always_full_publish

Bugfix for github issue #672 @ 1.1
SpriteBuilder-X simple introduction.
Difference from SpriteBuilder-X to SpriteBuilder
Add Download URL.
Merge branch 'v1.1' of github.com:beckheng/SpriteBuilder-X into v1.1