Merge pull request #21 from ismailsunni/develop

Fix issue #20
Possible fix for #22 - sites layer needs to be in same crs as parcels layer.
Possible fix for #22 - Tidy up imports.
Add new datatest.
Replicate issue 22.
Merge Tim's PR for issue #22 on PR #23
Fix for not 4326 CRS in site and parcel layer.
Comments.
Add data for unit test.
Update unit test and data to match the real world.
Merge pull request #24 from ismailsunni/issue_22

Fix Issue 22
Merge branch 'develop'
Bump version 1.0.6.