Added interaction with Vim

- When the compilation completes, and there is a failure, the build will tell
  Vim to open the quickfix file directly
- This assumes that there is only one instance of Vim running
Eliminated the mappings in the plugin

- They're really not any more
- Most people would probably have :cn mapped already
- The hard coded mappings also can't be configured, so rather than go through
  the trouble of making the configurable, I figure we just toss 'em