memory mode added

.gitignore:
- added a few files

files.cpp:
- made time slice array bigger
- added check for logging so time slice addition doesn't happen if
logging isn't active

parcel.cpp:
- added argument for testing to memory with fifo ("--fifo-test" and
"-f"), default copy size is 2GB

receiver.cpp:
- added state to handle fifo header

sender.cpp:
- added blocks to output fifo type file