add more information

[Nilay Sheth]

A suggestion not an issue:

Front silk

1. Add year of manufacture
2. version of board
3. name of main contributor (architect of the board)..

Rear silk

1. add logo
2. add some more pin labels (even if they exist on upper silk mask).

[Omkar Bhilare]

https://github.com/Aniruddha1261/sra-board-hardware-design/tree/master/documentation/images
New board images can be found here