Errors when calling geomfromewkt.

Geomfromewkt was not always properly called with just
one argument.
Libraries path and loading configurable.

Now we have additional constructors for the driver
in case we want to specify a different lib folder,
or even completely skipping their loading.
Added a suite of JUnit tests.

Removed the old method for testing the driver
and added a bunch of JUnit files with some
basic tests.