Avoid filtering markdown code blocks

closes #1045
- Fixed markdown code block format issue.
- Added test case to verify fix.
Update CONTRIBUTING.md
Merge pull request #1304 from jaswilli/patch-1

fixed typo in CONTRIBUTING.md
Merge pull request #1288 from zacgeis/codeformat-fix

Avoid filtering markdown code blocks
Dropping our incomplete support for node 0.11

issue #1287, issue #1147

- our support was partial, is based on node-sqlite3, which has dropped partial support as well
- node 0.11 is a dev version, and has lots of breaking changes
- we will add node 0.12 support when it is released
Merge pull request #1314 from ErisDS/no-node-11

Dropping our incomplete support for node 0.11