Add yum as a linux package manager
Update to latest msysgit
Add details of nano for windows users
Removed editorializing of editor
Point msysgit link to main page rather than hardcoding download
Update R install details
Updating the path to the Windows installer in the setup instructions
Merge remote-tracking branch 'gdevenyi/improvesetup'

Merge Gabriel's pull request which among other things un-pins the
msysGit version [1].  We've had some problems with previous versions:

* Something about email prompting with 1.8.4 [2].
* "fatal: could not read..." errors on https:// clones with
  1.8.5.2-preview20131230 [3,4].

but Gabriel tested v1.9.0 and didn't see an email prompt [5] and Git
v1.9.0 fixed the HTTPS issue [6]:

> Fixed regression with interactive password prompt for remotes using
> the HTTPS protocol (issue msysgit/msysgit#111).

So until we find more problems, we're back to floating msysGit :).

[1]: https://github.com/swcarpentry/bc/pull/485
[2]: https://github.com/swcarpentry/bc/wiki/Configuration-Problems-and-Solutions#bash
[3]: https://github.com/swcarpentry/bc/commit/fae9c74704b96de1e82a72533837612fb4a24877
[4]: https://github.com/swcarpentry/bc/issues/234#issuecomment-32764692
[5]: https://github.com/swcarpentry/bc/pull/485#issuecomment-42759353
[6]: https://github.com/msysgit/msysgit/releases/tag/Git-1.9.0-preview20140217

* gdevenyi/improvesetup:
  Update R install details
  Point msysgit link to main page rather than hardcoding download
  Removed editorializing of editor
  Add details of nano for windows users
  Update to latest msysgit
  Add yum as a linux package manager
Fixing capitalization
Making rebuild depend on ./index.html
1. Adding syllabus with point-form summary of topics to generic home page.
2. Adding links to reference guides.
3. Putting generic calendar in two-column format.
Moving Windows installer path into configuration variables
Merge pull request #488 from gvwilson/updating-windows-installer-path

Updating the path to the Windows installer in the setup instructions
Replacing 'coffee will be served' with 'coffee break'
Added newline in numpy lesson to fix formatting
Merge pull request #500 from zonca/numpy_lesson_fix

Bugfix: added newline in numpy lesson to fix formatting
Fix rendering of code block

Also add $ to tell input from output
1. Adding `helper` field to header (like `instructor` field).
2. Updating `README.md` to explain what it's for.
3. Updating index page validator to check `helper` field.
Merge pull request #494 from gvwilson/adding-topics-to-standard-homepage

Adding syllabus to default home page.
Addressing comments by @r-gaia-cs