- shortened I2C section in i2c_slave UG
- enlarged read and write transfers in elma_i2c UG

- updated top-level file
- finished user guide doc

- renamed vme64x_i2c to elma_i2c
- continued modifications on ug-conv-ttl-blo

- created i2c_slave_pkg file with constant defs
- added blinking of I2C LED in top-level file
- pulse generation now according to specification

Also started making changes to release top file
following discussion with Erik.

Also deleted old_rep_test folder and recompiled (and tested)

I2C slave working, with ELMA protocol on top. Submitting last changes + doc for I2C slave. Also updated order-record doc