gbk
Merge remote-tracking branch 'upstream/master'
Added xml-config

Similar to QConfig but holds an XML configuration Element
Upgrade to Gradle 1.12
Fixed minor PMD complains

See http://jpos.github.io/jPOS/pmd/main.html
ISOPackager doesn't have to extend LogSource

While it's a good idea for packager implementations to implement
LogSource, it doesn't have to be a requirement.
merge upstream master