Allow exclusions by regular expressions

I a new configuration element called 'excludesRegex'. You can use it just as 'excludes' however it is interpreted as an array of regular expressions.
This allows e. g. to exclude all apache projects. Example:
<excludesRegex>
	<param>org.slf4j:.*</param><!-- Not declared, but is apache-2.0 -->
</excludesRegex>

Furthermore I converted the excludes and blacklist into a HashSet to avoid redundant looping over the arrays.
Merge pull request #6 from mjunginger/patch-2

Allow exclusions by regular expressions