Basic integration of CStrChunk

Hi Anand,

  Here's the basic code to get your CStrChunk working in the system.  I fixed a couple of bugs in the CStrChunk, and then added a bunch of the code needed for tighter integration.  If you look at ParseData2.java you will see that I don't handle the conversion from reading in Enums to Strings yet.  What I have here allows you to easily comment out some of the surrounding code (say lines 666-670) and read a column in purely as Strings.  That should let you play with the CStrChunks as you need them.  I should finish the code to automatically read in Enums or Strings tonight.  In my testing, I have found that the H2O webpages seem to choke on rendering the strings column.   I haven't found the reason yet.  Let me know if you have any issues with this.

Thanks,
Brandon