added backwards compatability for pandas term parsing so we can work with pandas 0.13
fixed bugs related to self.store vs store_select. Found a couple of date caching bugs as well.  Rewrote config.py for YAML format.
@hhuuggoo can you confirm that start=start_row, stop=end_row are unnecessary inf store_select statements now?
fixed some bugs around backwards compatability, and reverted a few of @quasiben's changes
which were necessary due to the bugs
- coerce start/stop to ints, sometimes we were passing series of length 1 int there
- quoting strings for pandas expressions