Packages publish to zip defaults to NO.
Refactoring: PackagePublishSettings' default initializer not needed.
Publish package context menu option removed.
SpriteBuilder Pro BOOL constant IS_SPRITE_BUILDER_PRO added.
Convenience replacement for boolean assignments.
Preview panes Android settings hidden for SBPro.
Package publish settings detail view improvements.
Settings for zip publishing condensed to emphasize relationship.
Merge branch 'develop' into feature/501_5.1_publishing_tweaks

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
Merge pull request #727 from NickyWeber/feature/501_5.1_publishing_tweaks

Feature/501 5.1 publishing tweaks