GWHAT 0.1.0

As explained in Issue #75, a software for stream hydrograph analysis already existed with the name WHAT. To avoid confusion, we decided to rename our software to GWHAT. At the same time, it was decided to reset the version numbering of the software.

Distribution:

PR #79 : WHAT renamed to GWHAT

Documentation:

PR #86 : Ported and updated the documentation from Latex to Sphinx and published it on ReadTheDocs

Enhancements:

PR #83 : Added buttons to set "From Year" and "To Year" for all stations in the tool to download weather data.
PR #84 : Added support for coma separated text files for weather datafiles.
PR #96 : Added a button to delete input weather datafiles from the interface.
PR #82 : Improved the tool to search for climate stations in the ECCC database.
PR #104 : Small GUI improvements of the Page and Figure Setup Dialog window.

Bug Fixes:

Issue #92 : Fixed a bug that made GWHAT crash when changing the color scheme in Plot Hydrograph tab.
Issue #95 : Fixed a bug that made GWHAT crash when plotting results of groundwater recharge.
Issue #102 : GWHAT crash when trying to save the monthly weather average graph to disk.
Issue #40 : Adding ETP to file in the Gap-Fill Weather window crash the application.
PR #108 : Fix water_level_measurements file management and plotting
PR #109 : Fixed and improved the code to compute the water level trend line

Continuous Integration:

PR #101 : Added tests for gapfill_weather_gui.py, gapfill_weather_algorithm2.py, and manager_data.py
PR #107 : Fixed crash when trying to add PET to an existing file and added some tests.

More than 45% of the source code is now covered by tests.

TechDebt:

PR #100 : Changed project file extension to .gwt from .what