make it possible to inject the cascading version  to use via an environment variable
Merge pull request #157 from fs111/develop

make it possible to inject the cascading version via an environment variable
switch to hadoop 1.1.2 to speed up tests
switch to hadoop 1.1.2 to speed up tests
Merge pull request #158 from fs111/develop

switch to hadoop 1.1.2 for cascading 2.2 compatibility and speed up tests
add config setting to retain outputcollector. This is needed for Cascading 2.2 compatibility and fixes isse #159
use constant for new config instead of the string  and use true as a boolean instead of true as a String
used confing string instead of field again, to not break compatibility
Merge pull request #160 from fs111/develop

add config setting to retain outputcollector.