closes #153 many improvements to type layer (test, docs, refinement)

You have to scroll in GitHub to view this entire comment.  This seems to be a common problem.  The Accumulo formatter profile for Eclipse is currently set to 160 chars but GitHub only shows about 115 chars.  What do you think about setting the standard max line length to 115 or 110 for Fluo?  Not sure if we should have separate Fluo format profile but the Accumulo profile can be changed using the following steps:

 1. Java -> Code Style -> Formatter
 2. Edit Accumulo profile
 3. Set max line width to 115 characters in "Line Wrapping" & "Comments" tabs
 4. Shift + Ctrl + F will auto-format the file

I don't think 115 chars needs to be enforced at code reviews but I would like to pick a number so things will be consistent if a developer auto-formats a file.