[SERVDEV-22]
- Corrected bug: Equal KettleResultKeys with null string fields are considered not equal.
[SERVDEV-22]
- Added possibility to configure a cpk cache plugin through configuration file.
- Changed builds to copy default ehcache.xml configuration file.
[SERVDEV-22]
- Extended ICache interface to include getKeys and remove functionality
[SERVDEV-28]
- The timeToLive for cached kettle results can now be specified in a per element basis through the use of a kettle parameter named cpk.cache.timeToLiveSeconds.
[CLEANUP] - CodeStyle, comments and variable names
Merge pull request #6 from graimundo/master

[SERVDEV-22] / [SERVDEV-28]