Additional documentation for holiday calendars
@jreback here are the additional holiday examples.  Let me know if you want something else.

@rockg sorry I think I canceled your Travis build instead of mine on accident. Could you retriggger the build with

```
git commit --amend -C HEAD
git push origin <yourbranch> -f
```

Sorry!
 I'm going to do another commit so no worries.
 ping when u r ready to merge 
 @jreback  Think I understood what you wanted regarding separate ipython blocks.  Please take a look.  Further, there was one bad piece of code that got in during the merge which I took out.
 beautiful! thanks
