fix for #252
Formatting
A couple of tests for revere iteration on tables (see gh-252 and gh-253)
fix for #252
Merge branch '252' of github.com:scopatz/PyTables into 252
Merge branch 'issue252' of github.com:avalentino/PyTables into 252
Merge branch '252' into issue44
many edits to implement better slicing and iteration APIs, including a fix for gh-255
Added remove_row() method
some things work
negative row iteration works
more tests pass
even more tests pass
minor  API updates
rmoved some comments and updated some docstrings
Update docstings of table methods
Upated release notes