Added Buffer Error Checking - Invalid buffer if the buffer extends the globe and intersects itself, added test for this

Signed-off-by: varsis <chris@varsisstudio.com>
added .kml to gitignore

Signed-off-by: varsis <chris@varsisstudio.com>
Merge branch 'geoBufferedLine' of https://github.com/varsis/spatial4j into geoBufferedLine
Removed visual tests from github

Signed-off-by: varsis <chris@varsisstudio.com>