testParcel.py:
- Program to do a round trip test to localhost to test parcel

crypto.cpp/h:
- Some formatting & style changes
- Moved the code to return a routine for the encryption type into its own routine

files.cpp:
- Changed verbosity of some messages

parcel.cpp:
- Implemented log file, which now will write if it can, and also opens/closes on each output in case it goes away, so it's kinda slow.
- Added define to comment out backtrace on segfault
- Removed passing of number to verbose arg for now
- Added routine for sender to wait for control ack from receiver, need to add timeout just in case

parcel.h:
- Changed header_t to hold enum for control message

receiver.cpp:
- Added send of ack for transfer complete (using control message)

sender.cpp:
- Added routine & callback to handle ack complete message

udpipe_client.cpp:
- Unified cleanup of UDT

udpipe_threads.cpp:
- Removed any UDT::close because it's done outside after threads exit