Format Fixes and Added Markdown to a Few Files

[super3]

Just basic readability stuff. As I was cleaning I found two easily functional things to fix and added the follow issues:

• Refactor BitRPC.py
• Convert QA Bash Test to Python

[sipa]

Please don't make direct changes to the leveldb directory. If you want to convert their README to md, submit a patch upstream.

[laanwj]

Do not remove the indentation here, increase it to four so it will show it as a code block. Alternatively use this to highlight it as bash script:

```bash
rm -rf cache
killall bitcoind
```

[super3]

Done.

[super3]

Anything else before I squash?

[laanwj]

This is fine.

[BitcoinPullTester]

Automatic sanity-testing: PASSED, see http://jenkins.bluematt.me/pull-tester/d3081fa2314ac064c1054b58f4b11c332af6fe09 for binaries and test log.
This test script verifies pulls every time they are updated. It, however, dies sometimes and fails to test properly. If you are waiting on a test, please check timestamps to verify that the test.log is moving at http://jenkins.bluematt.me/pull-tester/current/
Contact BlueMatt on freenode if something looks broken.