i3 ubuntu build prereqs

Ubuntu w/Unity dependencies for building i3gaps:

xcb.h 			-- libxcb1-dev
xcb_keysyms.h   -- libxcb-keysyms1-dev
pango.h 		-- libpango1.0-dev
xcb_aux.h 		-- libxcb-util0-dev
xcb_icccm.h 	-- libxcb-icccm4-dev
yajl_gen.h 		-- libyajl-dev
sn-launcher.h 	-- libstartup-notification0-dev
randr.h 		-- libxcb-randr0-dev
ev.h 			-- libev-dev
xcb_cursor.h 	-- libxcb-cursor-dev
xinerama.h 		-- libxcb-xinerama0-dev

make && sudo make install

(if this doesn't do the job, install apt-file - use this to find the libs for any further missing header files)