Some code cleanup.

--HG--
branch : build_system_improvements
Merge 'default' branch.

--HG--
branch : build_system_improvements
Replace 'javolution' XML serialization with JAXB.

--HG--
branch : org.jenetics-jaxb
Add BitGene serialization compability tests.

--HG--
branch : org.jenetics-jaxb
Implementing 'XMLAdapter' for BitGene marshalling.

--HG--
branch : org.jenetics-jaxb
Add JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Add version placeholder.

--HG--
branch : org.jenetics-jaxb
Add version placeholder.

--HG--
branch : org.jenetics-jaxb
Add JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Add JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Add JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Add JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Implement JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Add generated code source directory to .hgignore file.

--HG--
branch : org.jenetics-jaxb
Add generated code source directory to .hgignore file.

--HG--
branch : r1.6.0
extra : source : 3d8db392b9f7878688ec19b52c7b79af0e186960
Add generated code source directory to .hgignore file.

--HG--
extra : source : 3d8db392b9f7878688ec19b52c7b79af0e186960
Add generated code source directory to .hgignore file.

--HG--
branch : build_system_improvements
extra : source : 3d8db392b9f7878688ec19b52c7b79af0e186960
Implement JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Implement JAXB marshalling.

--HG--
branch : org.jenetics-jaxb
Mark IO static fields (object, xml) as final.

--HG--
branch : org.jenetics-jaxb