Fixed clean target to remove previous driver builds.

Added support for URI filenames.

Fixes #42: Using shared in-memory with URI filename.

Merge with Linux and Mac OS X builds.

[maven-release-plugin] prepare release sqlite-jdbc-3.7.2

[maven-release-plugin] prepare release sqlite-jdbc-3.6.20.1

[maven-release-plugin] prepare release sqlite-jdbc-3.6.20

ignore setting