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fixes #204 (JQGrid does not accept dataset with name containing spaces)
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Merge pull request #205 from dennishendriksen/testing

Fix data set with spaces issue
bug fix: get(col) returns empty string instead of null
Merge pull request #208 from dennishendriksen/testing

Bug fix: get(col) returns empty string instead of null
added tools to join, template and (un)collapse rows based on unique column values
Merge branch 'testing' of https://github.com/molgenis/molgenis into testing
added apache commons cli (future: should be mavenized)