fixing handling for float frame values by truncating to an integer (for now, will need to rework the for loop)
added initial internal _process_started implementation
passing a better reason for ProcessTerminated along and defining reason=None as 'undefined'
consolidated error formatting into single function, renamed format_exception -> format_error, added last_error to POST data (seems to be an issue handling this on the master's side atm though)
Merge branch 'base_jobtype' of github.com:pyfarm/pyfarm-agent into base_jobtype
minor non-functional tweaks
fixing refactoring typo