Add DistanceFieldEffect to Hiero

This can be used to create signed distance fields, for generating fonts
that remain crisp-looking even at high magnification when rendered with
alpha testing.

See the Valve paper:
http://www.valvesoftware.com/publications/2007/SIGGRAPH2007_AlphaTestedMagnification.pdf
Add a test that shows the use of distance field fonts
Extract distance field generation into a standalone class

Also make it runnable as a command line tool
Merge branch 'master' into httprequests
modified Net API with some of the discussed changes, removed the createHttpRequest() method, modified processHttpRequest to sendHttpRequest(), added timeOut to the HttpRequest, added canceled() method to HttpResponseListener which must be called if the request was cancelled (probably by a timeout), error(code) wasnt added since HttpResponse already has the status code and that could be processed inside handleHttpResponse(HttpResponse), added input stream methods (maybe javadocs could be improved a bit)
removed timeout from getResult() methods from HttpResponse, added error() method to the HttpResponseListener
removed status code from HttpResponse, modified handleHttpResponse() method from HttpResponseListener to receive the status code of the HTTP response to know if everything went right or there was an error and should be processed.
Merge pull request #106 from ttencate/distance_field_fonts

Add support for generating signed distance fields
Merge branch 'master' into httprequests
updated HTTP javadocs of Net API
started to add an implementation to Net API for Android, using http-client provided by android, had to change some parts of the gdx net HttpResponseListener to have a method failed(throwable) to call if something fails that it is not a HTTP error
Hide compiled obj files in git
Changed BulletTest to BulletTestCollection and added ConstraintsTest
Added no-arg constructor for Circle.

See http://www.badlogicgames.com/forum/viewtopic.php?f=11&t=6043
Add some color to better distinct the objects
Add MeshShapeTest.
Cleanup a bit
getRotation for livewallpaper

But it's little bit buggy, don't know why.
If you place your device to 0 degrees position (portraite orientation) 
and rotate to 180 degrees, nothing be detected, or from 90 to 270 and 
versa. But if you rotate your device from 0 to 90 or 270, or from 90 
to 180 and 0 and so on - all is fine (different orientations).
Remove unnecessary staff
Merge pull request #107 from xoppa/bullet

Changed BulletTest to BulletTestCollection, added colors, ConstraintsTest and MeshShapeTest