Add indication for active switches, pressed keys etc

When listing supported event types that can have a state,
add '*' after the event name if the state is active.
The evdev_trace utility takes also shorter forms of evdev paths

For example "/dev/input/event1" can be shortened to "event1" or
just "1".
Refactored mcetool

Huge main() and status reporting functions split into smaller chunks.
The mcetool options are now processed in the order they are given.
Dropped session bus support.
Removed dead code.
Merge pull request #43 from spiiroin/tool_fixes

Improvements to mce tools