Messbauer generator plus differential discriminator signals in AX309 Board (Spartan 6)

Small fixes (docs structure plus formatting and small mistakes in commentaries).

Messbauer generator plus differential discriminator signals in AX309 Board (Spartan 6)

A working 2 versions of generator and diff discriminator divided into 2 connectors on different sites of AX309 Board under Spartan 6 (Stored in Flash memory and loads when power is on). All diagrams see in docs folder.