Fixed odds and ends,  and made convert_stream_to_masked, and _convert_trace_to_int non destrutive calls

Refactored code to put one channel at a time,  instead of one trace at a time, to fix a problem with writing to edge. Added logic to use cwbhost/cwbport if data is older then 10 days, and the cwbhost/cwbport are provided. Added starttime/endtime to put_timeseries to match algorithm base class. Other cleanup as discovered.

Completed comments.  Changed _send_trace to _put_trace, and moved RawInputClient initialization and close into _put_trace.  Added routines to change a trace to a masked array, and change channels into int.

Added basic checking of start/end times. Divide by 1000 to pass back actual data.  Post process data, to convert traces from Masked arrays, to ndarrays with nans for gaps, and fill stretch the beginning and ending of arrays with nans, to make the arrays the same length, as the time asked for.

Removed unused public methods.  Added _set_metadata, which sets channel, type, interval locally. Cleaned up some logic

Added EdgeFactory, ObservatoryMetadata and their accompanying tests.  EdgeFactory only has get_timeseries implemented, put_timeseries will be done later.  ObserveatoryMetadata has the Observatory information hardcoded for now, future implementations will use something more dynamic.