Merge pull request #37 from RAOF/master

Switch PTYs to raw mode.
Merge pull request #38 from RAOF/master

Allow passing “NULL” as the device node in umockdev_testbed_load_script
Bump version to 0.7, new behaviour
release 0.7
Add umockdev_in_mock_environment().

This function returns whether or not the current process is running in a umockdev testbed
Only send a add uevent from add_device if running in a umockdev testbed environment.

Fixes error messages when loading devices from the umockdev-run commandline