New Version (v0.2.0.0)

[Bartesto]

Hello.
I have released a new version today which addresses some issues that @SJSapford found when trying the fire_freq and fire_interval functions. Other changes include:

• Cropping of raster data was previously done using the aoi vector, which could
  introduce inconsistencies in reporting areas. An aoi raster mask addresses this.
• The time periods are financial years (July-June) not calendar years (January-December).
  This is due to the fact that the fire season in the south west predominantly
  occurs during the summer months. Bear this in mind when analysing fires in the
  north.
• YSLB now contains an "unknown" category. This category is applied to any area
  in the aoi where there is no burn history for the time period chosen. It is
  reported on in exported stats and is represented in the map as a grey region
  bordered by a red boundary.
• Better axis labeling for column charts.