Merge pull request #17 from rnc/master

Add org.eclipse.m2e exclusion
Replaced logging methods from org.apache.commons with org.apache.maven.plugin
Removed commented code from MavenScmRevisionNumberFetcher.java
Removed all custom logging
Replaced LoggingUtils.configureLogger(log, logLevel) with getLog
Re-enabled mercurial scm support in pom.xml
Cleaned up left over custom logging code
Fix Git/HG/svn revision retrieval. Use one path for retrieving revisions