Fixing get_data_yahoo/google pause and retry
Provide pause and retry_count to _get_hist_yahoo/google when single value given for symbols. Now pause option works, as described in docs.

Thanks for this!
 @gliptak cc @jtratner
this looks independten of your network catching stuff?
 @Rambominator this was essentially a bug fix, right? (e.g. the retry didn't work before).....

can you add a test (e.g. maybe test a bogus symbol), then just a real symbol to validate its working

pls add a mention in release notes
 > @Rambominator this was essentially a bug fix, right? (e.g. the retry didn't work before).....

Yes, a bug fix. Users provided arguments: pause and retry_count, was not provided to the function which realy uses them, so function always worked with default params retry_count=3, pause=0.

> can you add a test (e.g. maybe test a bogus symbol), then just a real symbol to validate its working

Symbols has nothing with this fix (with wrong symbol get will raise 404), as I see it, the only possible test is mocking urllib2.get, so it will not return 200 response, and compare time >= retry_count \* pause

> pls add a mention in release notes

added
 @Rambominator sorry i didn't see this before. in my clean up of data.py this has been addressed.
 thanks
