Release version 1.6
Post-release version bump to 1.7.0-dev
pco: add global shutter support
pco: add "global-shutter" property
Minor reformatting in pylon plugin build script
Update pylon-plugin to libpyloncam 0.4
Improve robustness of roi setting for pylon plugin
Implement auto exposure property for pylon plugin

Conflicts:
	plugins/pylon/CMakeLists.txt
	plugins/pylon/changelog.txt
	plugins/pylon/uca-pylon-camera.c
Add missing property specification for exposure-auto
Merge pull request #59 from miq/plugin-pylon-improvements

Plugin pylon improvements
Fix printing non-existent error

This caused a segfault when unreffing a camera object which was still recording
but stopping it was not failing.
Add Python support code to release GIL on grab

A compile time switch WITH_PYTHON_MULTITHREADING has been added that toggles GIL
releasing.
Merge pull request #60 from ufo-kit/release-gil

Release GIL
Pick release notes of version 1.6.1
Fix #61 causing a race condition

The buffer thread now waits on the *intent* to stop the recording (i.e. the
internal state) instead of using the external state information.
Pick release notes of version 1.6.2
benchmark: print message if camera not found
Fix grab if Python is not used
Make benchmark output parse friendly
xkit: remove unused timer