put metadata in sub-dictionary, added data_interval_type in outer dictionary,  added code to deal with the new observatory dictionary format

Removed unneeded data from DEFAULT_METADATA. Added routines to fill sensor_sample_rate and data_interval_rate based on the interval.  Moved setting some data from EdgeFactory to public set_metadata method here.

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.

Docs

Updated Title.

Readme windows

Changed link to be local.

Changed documentation link to be local

Changes links to be local.  Change the titles to the actual titles, instead of the file names.  Updated the descriptions of the files.

Use assert_almost_equal instead of assert_equal to account for floating point precision on different hardware...PCvsMAC

Moved the Algorithm section after the practical considerations section, since it refers to that section.