tmxviewer: Support staggered maps
tmxviewer: Added error handling

* Print out the error message
* Don't crash when the map failed to load
Merge pull request #677 from yehnan/master

add translations/tiled_zh_TW.ts
Make sure the new Traditional Chinese translation is released
Removed a superfluous snippet from libtiled.pro

This snippet was already included from tiled.pri.
Removed unused function
Add Bountysource badge to README

Because you have some open bounties, we thought you might want to display this badge in your README!
Fixed automapping object region check.
Merge pull request #697 from Roflraging/objectautomappingfix

Fixed automapping object region check
Merge pull request #685 from bountysource-support/patch-1

Add Bountysource badge to README
Added Travis CI badge
Prettier Travis CI badge
Updated NEWS file in preparation of 0.10 release

No release date is planned yet, it will happen when it's ready.
Added render-order option for map

Closes #455
Allow dragging image layers

Creates a tool which allows the current image layer to be dragged with the mouse.
NEWS file updates

And some small code style tweaks.
Some include cleanups
Fixed some cleanup related to closing documents

The cleanup was happening on document close requests rather than when
documents are actually being closed, and depending on the connection
order it may even have happened after the close request was already
handled.
Fixed the file system watcher in case a watched file is replaced

This approach seems to work for files saved with vim. Maybe it also
fixes the problem with watching tilesets saved by Photoshop.
Fixed compile against Qt 4

filesystemwatcher.cpp:78:26: error: invalid use of incomplete type ‘struct QStringList’