x11_output: respect alignment and gap_* settings
Delete XDBE code which was superseeded by x11_output
Another round of cleanup of conky.cc

I just want to specifically mention that I'm dropping support for XDamage. I don't understand
what that thing was used for anyway. If someone is missing it, he try reintroducing it.
Create a file for small utility classes
Remove own_window_transparent setting: transparency is now controlled by own_window_argb_value
Fix small bug in x11_output
Handle ConfigureNotify event

this also fixes a bug, where Xft font drawing didn't work under certain conditions.
x11_output: handle reparent events
x11_output: handle button press/release events
Fix compilation with gcc-4.6