add .gitignore & remove databases created by the tests

Author: ARF

.gitignore

@@ -0,0 +1,21 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# test files
+shapefiles/test/
+
+# Spyder project settings
+.spyderproject
+
+# Rope project settings
+.ropeproject
+
+# Visual Studio project settings
+*.pyproj
+*.sln
+*.suo