Merge pull request #157 from fs111/develop

make it possible to inject the cascading version via an environment variable
Merge pull request #158 from fs111/develop

switch to hadoop 1.1.2 for cascading 2.2 compatibility and speed up tests
Merge pull request #160 from fs111/develop

add config setting to retain outputcollector.
Merge pull request #162 from fs111/develop

Harmonize hadoop version (1.1.2) across all subprojects.
set the cascading framework property with cascalog and it's version