cursor function has infinite loop when used with search function

[cash]

Once #298 and #299 are fixed, the cursor function does not return even though there are no more results. This is because of the metadata returned for search/tweets which causes the not content check to never pass.

[clayheaton]

These are all pretty serious issues. I spun my wheels trying to figure out the infinite loop problem for a few hours. I guess I'll drop back to the "old way" for a while.

[s0ckz]

Check if it works: #332
I only tested for search and get user tweets. But with some tweaks I think it handles the rest.

[tag]

Stopped by to say I'm still seeing this issue with twython (3.6.0)