Checks if file exists in CopyOperation during "undo" execution

 * if file does not exist, do not try to remove it

Change-Id: I6f4afd11bd404994c2f732ded51f2fbd0d2373d6
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Add to README that only Qt 4.8 is supported.

Change-Id: I236ebc67895ac4159672fc12cd912c8ff17407e4
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
Merge remote-tracking branch 'origin/1.3' into 1.4

Conflicts:
	README
	src/libs/kdtools/kdupdaterupdateoperations.cpp

Change-Id: I88cf580f58ef44a85131cd53410b374c24996daf