Removes our local fork of the JTS ShapeWriter.
Our changes have been integrated in JTS 1.13, we don't need the fork
anymore.
Adds some documentation in MapTransform
Fix the lagging problem described in #323.
Fix some violations and adds some doc.
various sonar violations should be fixed by this commit
Merge pull request #356 from agueganno/various-small-fix

Various small fixes: We especially provide improvements for both #237 and #323. Other commits are here for documentation and to fix some violations reported by sonar. A note about sonar: we're adding violations again and again but:
- They're rarely serious
- The global code quality is stable, meaning that most of the code we add is clean