Add basic support for dependency version ranges

In previous versions XMvn did not support dependency version ranges.
If range was used in POM then Maven would try to resolve all available
versions from remote repository and pick the best match.

Starting from XMvn 0.5.0 any dependency version ranges without
recommended version specified are replaced with version SYSTEM, which
means default artifact version in the system.  This prevents Maven
from trying to use remote repositories.