Fixes GLES build

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15914 3db68df2-c116-0410-a063-a993310a9797
New unit mesh variations and heads with some example animations and units xmls

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15915 3db68df2-c116-0410-a063-a993310a9797
Update sprintf.js to the latest version 1.0.2 (https://github.com/alexei/sprintf.js).

Update suggested and patch generated by Shane, fixes #2859.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15916 3db68df2-c116-0410-a063-a993310a9797
fix a JS error

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15917 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'
prevent petra to build siege towers as it does not know how to use them

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15918 3db68df2-c116-0410-a063-a993310a9797
Upgraded persian buildings:
blacksmith, dock, farmstead, defense tower, wonder


git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15919 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'