Agilent bioanalyser

File validator tests all passing
Tidied up the code a little

Put some documentation in there
Added file_validator to MANIFEST

Also changed sample_uuid_assigner to sample_receiver
Removed unecessary validation

Checking that there were no more than 4 files
was not required
Merge pull request #163 from jbeast/agilent_validator

Agilent validator
manually merged MANIFEST