Adds notification tooltips for building placement, fixes #921.
Tweaks info tooltip borders and padding to improve readability.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@13191 3db68df2-c116-0410-a063-a993310a9797
Don't use Number, parseInt, etc. per coding conventions (use the +operator instead)

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@13192 3db68df2-c116-0410-a063-a993310a9797
Merge remote-tracking branch 'remotes/trunk'