Merge pull request #73 from im-saxo/dev

flash size increased
* changelog
Merge branch 'dev' of github.com:mailru/FileAPI into dev
added xhr.append method to add files to the existing request
added X-Last-Known-Byte header support for smart chunked upload recovery
added pause callback
Merge pull request #74 from wingedfox/master

New features (proxyXHR.append, X-Last-Known-Byte, pause event)
added current flag to abort method to abort only currently uploading file
fixed progressbar jumps on retries and added check for explicit and implicit connection aborts
fixed flash.abort
Merge branch 'master' of https://github.com/mailru/FileAPI

Conflicts:
	FileAPI.flash.swf
Merge pull request #77 from im-saxo/master

* fix flash.abort
* v1.2.3: fixed flash.abort, #75
Merge branch 'master' into dev
fixed formatting
Merge pull request #76 from wingedfox/master

Fixes and features
 - FileAPI.addMime; + FileAPI.accept;
v1.2.4: Fixed auto orientation image by EXIF (Flash)
* Fixed image dimensions after rotate (Flash)
flash rotate: use round instead of ceil (fix image dimensions after rotate)