- wr-nic.md improved
	- Move the dia diagram file to the imgsrc folder
	- Unnecessary files deleted
	- dio_core_pps image improved

This package is needed to use 'H' option in figures.

Note: In the wrpc-sw repository, a tag has been created for the new release version of wr-nic. This tag is "wrpc-v2.1-for-wrnic".

	- New wrc.ram file with updated filter rules.
	- Deleted unnecessary wrc_without_etherbone.ram file.
	- Deleted unnecessary ep_pfilter_old.c file in extra folder.
	- Updated ep_pfilter.c file in extra folder.

The first channel is set with 0 so that we force it to be output mode
p/P & i/I mode will be only available for ch0, and D,d,1,0 will not be
working (they will be seen as p/P).

	- Updated WR-NIC architecture diagram (dia file uploaded too)
	- Changes in doc/wr-nic.md to update information
		- Channel 0 output is dedicated for 1-PPS signal
		- P mode removed from DIO configuration registers
		- Added new section about remote configuration with Etherbone
		- Initial channel configuration is changed
		- Updated LM32 firmware generation

wrc.ram: Updated to last version with Etherbone support. Copy ep_pfilter with etherbone to extra folder.

- OUT is enable when one pulse occurs or 1-PPS ch0 signal is enable.
- TERM enable when any resistor termination channel is enable

dio: Added DIO ch0 input support and hold DIO ch0 output as 1-PPS dedicated signal. Deleted PPS mode in DIO core

- Added Etherbone core as wishbone master in top crossbar.
- Added a multiplexer to connect Etherbone and Nic core to wr-core.
- Connected wr-core to Etherbone configuration space to access Etherbone registers.
- wrc.ram: Updated with Etherbone support. (Old: wrc_without_etherbone.ram)
- wrc.ram: Updated ep_pfilter for Etherbone packets. You can see this configuration in extra folder.

We have remove all connections (input and output) of first channel to the DIO.
In the future we might re-add the input connection...

gateware before putting it in /lib/firmware/fmc folder.

We want to make clear that this architecture is to run a dio with wr-nic on a
spec board. No changes in the code was made except renaming files.

adding GM mode

Create the a new inout register to setup default value.
use it instead of GPIO register for O_E_N and TERM_E.

WR-NIC was almost out of Block RAM when sythesis was done with chipscope. Then
ISE was trying to pack descriptors' buffers in wrsw_nic into distributed RAM
instead of block RAM. As a result FSMs inside wrsw_nic were able to read
descriptors written by the linux driver, but linux driver was not able to read
updated descriptors written by FSMs. This commit fixes this problem by reducing
the amount of RAM utilized by chipscope cores.