Added a little instruction for OSX users for successful compiling on 10.8.5

swapping out `virtualenv env` for `virtualenv -p python2.7 env`
Updated docs to reflect MacOS instructions for getting started
Added some more file to ignore, such as the _build folder in docs and nasty .DS_store files on Mac
Change to use feedparser instead of atom.core. Fix some lint warnings.
Use custom bug parser specified, not hardcoded RoundupBugParser
Reworked A LOT of the google bug importer to use successive CSVs (issue871)

There are still a few broken thing in this commit (including some previous tests).
However, this is really more of a WIP commit.
Adding back the older bug url logic. Removing deprecated tests (issue871)
Removed unused test data (issue871)
Stop testing on Python 2.6

Upstream scrapy stopped supporting Python 2.6, so we can either support
Python 2.6 and pin ourselves to an old version of Scrapy, or declare that
we don't support Python 2.6 anymore.

Given those choices, I'm going with the latter.

Thanks to @ehashman for emphasizing the importance of this.
Update install docs for newer Debian versions

Tried to test this code out properly under testing+unstable as of 2014-05-06, and it fell down in a few areas. Substantive changes:

* libxml-dev (no such package, even in stable or Ubuntu) -> libxml2-dev
* libssl-dev is required now, and the "develop" phase will fail if it isn't installed
* Reformat instructions list to be better RST, and more consistent
* Make the test framework sound less optional :)
Merge pull request #49 from catherinedevlin/master

Use custom bug parser specified, not hardcoded RoundupBugParser
Merge pull request #42 from luzpaz/patch-1

Added a little instruction for OSX users
Merge pull request #44 from jvasallo/master

Updated docs to reflect MacOS instructions for getting started
Merge branch 'master' into issue986

Conflicts:
	docs/intro.rst
Cleanup from docs merge, removal of python2.6 hint
Merge pull request #53 from ehashman/issue986

Update install docs across PRs, fix issue986
Deleting unused function "log_error"
Remove unused data_transits variable and finish_import function
In OS X-specific instructions, call pip correctly

@SarahPythonista discovered this docs bug.
Merge pull request #54 from SarahPythonista/master

Removing vestigial references