Created a buffer implementation which uses the autopointer registers .

[RacingTornado]

This commit adds buffer support to the FX2. The steps to follow are similar to the other commits:
To run this first clone the repository, then cd to the fx2lib directory and checkout this particular branch.
After this run 2 commands:
git submodule init
git submodule update
make
After this , navigate to the examples/buffers directory and execute the following commands:
make
Now push the FX2 device inside the USB port(remove any udev rules you may have set up for Cypresse's VID and PID) and run
make fx2_download

Assuming you are using the exact same code with UART pins not modfied , the TX pin is connected to PA2. The baud rate is 115200. You can open a minicom terminal
sudo minicom -w config
and then load the program. (Generally the terminal must be open before loading the program.)

You should see the bytes on the minicom terminal

As per the previous commit , the following registers have been renamed
-__sfr __at 0x9A AUTOPTRH1; +__sfr __at 0x9A AUTOPTR1H;

-__sfr __at 0x9B AUTOPTRL1; +__sfr __at 0x9B AUTOPTR1L;

-__sfr __at 0x9D AUTOPTRH2; +__sfr __at 0x9D AUTOPTR2H;

-__sfr __at 0x9E AUTOPTRL2; -__sfr __at 0x9E AUTOPTR2L;

This causes the Travis build to fail. If you let me know whether you want to create another definition or not to maintain compatibility, I can make the required changes.