Add entity for fifo for buffering video
Add definitions-package for hdmi
Add entity gearbox_10to5
Testpost. Please ignore.
Fix whitespace
Add vallidity-indicator to sram_bus_data_t

This is nessesary so that the crtc can know if its
request was fulfilled.
Add a helpers package containing useful functions
Mostly implement HDMI

The final serializer and related clocking is missing.
Add modules for HDMI to project.
Change HDMI a lot. Implement the bridge.
Implement getto-hdmi.
Merge branch 'master' into getto_hdmi

Conflicts:
	common/defines.vhd
	vhdl.xise
Merge branch 'master' into getto_hdmi
Implement SRAM arbiter
Implement SRAM arbiter
Merge branch 'arbiter' of github.com:dmpro2014/fpga into arbiter
Merge branch 'arbiter' into hdmi_n_arbiter
Connect hdmi module to the rest of the system
Add clock unit to generate all them clocks
Fix tb_system and output the system clock for testing and debuging