Enable Non-Square Sprite Sheets

Resize width and height alternatively while packing images into
non-square sprite sheets
Merge pull request #648 from djh-/develop

Improve Texture Packing for Non-Square Sprite Sheets
Bugfix: Github issue #649.
Issue with psds and smart sprite sheets.
Republishing for a unchanged already published smart spritesheet caused the fllelookup to be overwritten without the renaming rules.
Solution: Sprite sheet operation create an intermediate filelookup file in the smartsheet folder which is then loaded and merged with all other lookups and intermediate lookups.
Intermediate filelookups are deleted if smartsheet flag is removed from folder.
Merge pull request #660 from NickyWeber/bugfix/1.1/#649_psd_filelookup_issue

Bugfix: Github issue #649.
Initial version of Sprite Builder Pro Installer.
SBPRo version written.
Install file version stored in Xcode.
Android plugin version file working well.
fix up error detecting.
Modify build scripts.
update build scripts to support Pro.
pretty good working config file.
generic properties.
Sprite Builder product name with no quotes.
Merge branch 'develop' of https://github.com/spritebuilder/SpriteBuilder into develop
fix unit tests by casting things to ints.
Merge branch 'develop' into sb_pro
Working migration detections to SB Pro
fix up SB Pro installer error message
fix up all tests and config files.