Issue #33 New Test Image Generator with more life

This test pattern generator generates 8 colored vertical bars with their
colors alternating with their complement/negative color , after every 1
second.
This was also meant to be as exercise become familiar with Git workings.
Issue #33 New Test Image Generator with more life 

This test pattern generator generates 8 colored vertical bars with their
colors alternating with their complement/negative color , after every 1
second.
This was also meant to be as exercise to become familiar with Git workings.
Merge pull request #41 from rohit91/master

Fixes Issue #33: New Test Image Generator with more life
Adding a description of the github issue labels inside a CONTRIBUTING document.
Merge pull request #60 from mithro/github-issues

Adding a description of the github issue labels inside a CONTRIBUTING document
ISE: Fix project paths

The ISE project cannot open as the HDL files have moved since it was
last used. Fix the paths so that it works again.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Add UART to design

This uses the Exar XR21V141x UART to USB bridge that is present on the
Digilent Atlys development board.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Add debug module

The debug module collects counters from the system for debugging.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Connect counters to system

This connects the debug counters to the appropriate points in the
system.

Signed-off-by: Joel Stanley <joel@jms.id.au>