Made plotting optional and changed sync calls

Changed sync call in line with modifications to ami.py to support
a new arm_sync method
Added sync methods

added arm_sync method which stores sync time to file as in medicina
Added parameters to conf file
Added code for talking to with ami metadata server

Added a python script for testing, and a module combining packet
format descriptions and methods for packing/unpacking and
setting up connections
Added h5 file writing

via a new module and capture script.
Meta data from the ami control server is embedded in these files.
Default (for now only) behaviour is to continuously record whenever
the telescope is active, starting a new file for each new source observation
Added .gitignore