Update Bootstrap to 3.1.1
Check if cell have parser to catch undefined error

If you have a table with more table rows than header rows, or use
colspan in the table head then it will fail to find a parser, giving us
a runtime error.
Merge pull request #546 from antila/master

"TypeError: parsers[j] is undefined" in tablesorter.js line 302
Merge branch 'master' of github.com:Mottie/tablesorter
Fix table reset on pagination change

We were getting an issue we were getting:
1) filtering to, say, 15 rows
2) moving to the last page
3) changing the pagination to more than 15 (or whatever)
4) no rows displayed

This seemed to fix it.
Merge pull request #548 from evanboho/patch-1

Fix table reset on pagination change
Merge branch 'master' of github.com:Mottie/tablesorter
update pager widget with change from #548
column count now correct with nested tables + tfoot. Fixes #547
version bump