Update a few spots in readme and fix a require statement

[DaveWelling]

I really appreciated the work you did in this repo, so I wanted to suggest a few fixes so I could share it with others that are using android. Hope this helps.

[kkbhav]

@DaveWelling, the repo react-native-fetch-blob is updated and now uses rn-fetch-blob as the project name internally. Which is why there is a discrepancy in the names.

Also, I have made some changes in fetch-blob library to bypass some errors in case of file-uri detection. I did not have time to put the PR back to the library. Please go through the mentioned install process and let me know if you encounter any problems in that.

[kkbhav]

@DaveWelling, I found out that I did not update the installation instructions after updating my react-native-fetch-blob repo. Please try it once again.

Sorry for the inconvenience caused.

[DaveWelling]

@kkbhav Thanks for taking a look at the PR, thanks for the commit and thanks for creating these libraries! I am very happy to have found your repos. I will test out the new commit, but I haven't gotten to it yet. Assuming everything works, the PR change I made to the README.md link and RNPatchUtil.js will not be necessary, right? I think the Android specific changes I made to the README.md might still be necessary? Would you like me to change this PR with just those changes?
I was also trying to think of a way to help you create an NPM package with SEMVER to avoid similar problems in the future, but I think it just needs an npm publish <package-name> for both?
I know it is a pain to work with two packages simultaneously, updating both, have you considered using the npm link command to help with that instead of directly linking the git repositories? Let me know if there is anything I can do to help, and thanks again!

[kkbhav]

@DaveWelling I finally got the time to push npm package. Please have a look.
pouchdb-adapters-rn

Also, fetch-blob is used internally by this library and the official library have not merged my PR till now. I need this PR to get merged so that I can use the npm version of this library. Till that time, we have to custom install the fetch-blob package.