Set gstreamer to OPTIONAL on OS X
build: gstreamer detection

fixed build problem on mac
iOS: Fixed issue where boookmarks were saved even though cancel was pressed
iOS: Corrected wrong function signature
core/capabilities: Enable other codecs when RemoteFX is used

CARDP_CAPS_CAPTURE_NON_CAC tells the server to send other codecs as well if RemoteFX is used. This
should be on per default and only be disabled if RemoteFxOnly is set (eg when capturing a RemoteFX
session).
winpr/mutex: Support for bInitialOwner in CreateMutex
cmake: Allow project-wide includes for third-party components
Merge pull request #1153 from mfleisz/master

Android: Fix crash after changes in FreeRDP directory handling
Merge pull request #1155 from bmiklautz/gstreamer_detection

Gstreamer detection
Merge pull request #1157 from mfleisz/iosfix

iOS: Fixed issue where boookmarks were saved even though cancel was presed
Merge pull request #1160 from bmiklautz/othercodecs

core/capabilities: Enable other codecs when RemoteFX is used
Merge pull request #1161 from bmiklautz/mutex_init

winpr/mutex: Support for bInitialOwner in CreateMutex
Merge pull request #1162 from mfleisz/cmthirdparty

cmake: Allow project-wide includes for third-party components