Fix assertions in Buffer::insertLines()/eraseLines()
Only damage the necessary lines on Buffer::insertLines()/eraseLines()
Fixed bug in managing _savedCursorCol on resize
Neaten up _originMode logic
Prevent buggy programs crashing us in IL/DL/DCH
Fix behaviour of DECSTBM when args not explicit.
Misc checkpoint - non-functional changes
Catch exceptions by const-reference
Call xcb_flush() from the window - fixes hanging window after exit
Re-jig the main event loop
Beginnings of client/server support.
Poor man's client/server arrangement, but it will do for now.
Cop-out README.md - better than out-of-date mess.