Merge pull request #16 from christ66/master

Fix failing test units.
Downgraded groovy version and fix for MacOS X.
Merge pull request #19 from jtalaga/master

Downgraded groovy and fix for MacOS X.
Fix issue where instrumenting with jdk 1.4 and lower causes Illegal type in constant pool.
Fixed root pom to use cobertura 2.0.1-SNAPSHOT version.
Merge pull request #21 from christ66/master

Fixed issues for cobertura-maven plugin.
Merge pull request #5 from cobertura/master

Merge latest trunk.