These files add modules to write timeseries out in json format.

Added interval to git_slice to differentiate between seconds and minutes.  Minutes were getting an extra minute in the file

cleaned up some code, added obsd as an input,  added check_stream to make certain the expected channels are coming in.

refactored to more cleanly use either files,  or stdin/stdout, added a write_string method to the iaga2002 factory, and some misc cleanup