Update for NME 3.5.3

git-svn-id: https://nekonme.googlecode.com/svn/trunk@2302 1509560c-5e2a-0410-865c-31c25e1cfdef
Increment version for development builds

git-svn-id: https://nekonme.googlecode.com/svn/trunk@2303 1509560c-5e2a-0410-865c-31c25e1cfdef
NME 3.5.3 hotfix (Minor fixes for Haxe development builds, safe checks around extension paths)

git-svn-id: https://nekonme.googlecode.com/svn/trunk@2304 1509560c-5e2a-0410-865c-31c25e1cfdef
Update version number for development builds

git-svn-id: https://nekonme.googlecode.com/svn/trunk@2305 1509560c-5e2a-0410-865c-31c25e1cfdef