Removed GWT emu for AtlasTmxMapLoader and TmxMapLoader
This removes duplicated code for the GWT emulations and is a preparation for issue #1087
AtlasTmxMapLoader and TmxMapLoader now use the emulated GZIPInputStream and InflaterInputStream classes.
Removed unnecessary casts.
Merge branch 'origin/master'
Streamhandling in NetJavaImpl plus tests for POST
GWT emu for BufferedInputStream does not implement 'available'
Made BufferedInputStream a FilterInputStream for the emulation (as buffering makes no sense in the emulation) and changed FilterInputStream.available to call the underlying stream.
This could fix the Issue #1175
Merge pull request #1177 from hneuer/gwtbuffstream

GWT emu for BufferedInputStream does not implement 'available'
Merge pull request #1172 from hneuer/netapipost

Streamhandling in NetJavaImpl plus tests for POST
Closes #1176
Removed GWT emu for AtlasTmxMapLoader and TmxMapLoader
This removes duplicated code for the GWT emulations and is a preparation for issue #1087
AtlasTmxMapLoader and TmxMapLoader now use the emulated GZIPInputStream and InflaterInputStream classes.
formatting
Merge branch 'tmpackerstreams' of https://github.com/hneuer/libgdx into tmpackerstreams

Conflicts:
	tests/gdx-tests/src/com/badlogic/gdx/tests/gwt/GwtTestWrapper.java
Merge pull request #1131 from hneuer/tmpackerstreams

Removed GWT emu for AtlasTmxMapLoader and TmxMapLoader
Add missing set boolean convenience method