fixing outdated transport docs
Merge pull request #109 from mdelagralfo/transport-docs

fixing outdated transport docs
Added SQS transport
fixed zeromq tests
Added support for rawjson format
fix issue where a field may not exist in the data
added support for specifying file encoding, using io.open vs os.open
Added support for mosquitto transport
added support for pubsub zmq
refactor seek_to_end to properly support file tailing
refactored worker so as to allow further data to be added to the file_map
Added support for sqlite3-based sincedb. Refs #6 and #39
added support for gzipped files. refs #39
centralize timestamp retrieval to base transport class
pass in timestamp from worker class for more accurate timestamps at the cost of speed of sending
ensure internal file_config state is updated
ensure all sections have the proper values on start
properly cast boolean values from strings
add support for ignoring empty lines
Raise an AssertionError when run in daemon without a pid path specified. Closes #112