Update README.md

Update Readme

README.md

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+*I haven't been updating this for a while, but I just setup a EC2 instance and tested this. Looks like most of the things are still working fine. I have some new research needs myself, so I might update this more frequently in the next few months. But, in general, I would be happy to take requests to add specific functionalities, merge pull requests, and even requests for specific datasets. Just make a ticket ;)*
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 tweetf0rm
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 Twitter license (or at least the company's position on this) does not allow me redistribute the crawled data (e.g., someone asked the question a while back: https://dev.twitter.com/discussions/8232). But, here is what I have:
 
-* **Health topics followers**: I crawled **2,686,823** users' tweets (i.e., as of 11/12/2013; maximum of 3,200 per user, limitted by Twitter apis) in a matter of two weeks. All thhese twitter users follow one of the following, what I call, health-related information centers (i.e., person or organization who share health-related information, such as the [CNNHealth](https://twitter.com/cnnhealth). Note that, some of the users either haven't posted anything or have set the privacy setting to private, so it will show zero tweets for these users. Anyway, I haven't done anything to this dataset yet besides doing some pre-processing (indexing, calculate common statistics), although I have some research ideas that I am planning to try. If you want to get a hand on this dataset (either collaborate with me or just want the data), contact me at <jbian@uams.edu> :). The detailed stats such as how many tweets will be posted as soon as my code gets them calculated (**821,449,519** unique tweets). 
+* **Health topics followers**: I crawled **2,686,823** users' tweets (i.e., as of 11/12/2013; maximum of 3,200 per user, limitted by Twitter apis) in a matter of two weeks. All thhese twitter users follow one of the following, what I call, health-related information centers (i.e., person or organization who share health-related information, such as the [CNNHealth](https://twitter.com/cnnhealth). Note that, some of the users either haven't posted anything or have set the privacy setting to private, so it will show zero tweets for these users. Anyway, I haven't done anything to this dataset yet besides doing some pre-processing (indexing, calculate common statistics), although I have some research ideas that I am planning to try. If you want to get a hand on this dataset (either collaborate with me or just want the data), contact me at <ji0ng.bi0n@gmail.com> :). The detailed stats such as how many tweets will be posted as soon as my code gets them calculated (**821,449,519** unique tweets). 
   
   * https://twitter.com/RWJF
   * https://twitter.com/samhsagov