Added recommended gitignore rules from Craft

added: rules for ignoring precompiled headers for C/C++

Quoting from http://symfony.com/legacy

  The symfony 1.x branch of the framework started in 2005 and the latest stable
  version and long term support release is symfony 1.4. As of November 2012,
  symfony 1.x is not maintained anymore and you are encouraged to have a look
  at Symfony2 for any new projects.

Amends #1165

Add *.Rproj for RStudio users

RStudio - the only real R IDE, and an incredibly commonly used environment for R, particularly since it has git support - uses .Rproj files in projects, that follow the pattern projectname.Rproj. Adding *.Rproj to capture these and exclude them.

Add ebin, rel example, concrete dev mode, .rebar

add Windows shortcut files

Add ignores for bower-rails

New version of eledmac on CTAN adds new extension file

Ignore *.converted-to-* files in TeX

Fixed binary gettext files rule: .po -> .mo

ignoring new Magento 1.9 default theme

Create LyX.gitignore

Ignores *.lyx~ (crash recovery) and *.lyx# (timed autosave) files generated by LyX - the document processor.

Create Momentics.gitignore

Updated Zend Framework gitignore as per docs

Update Unity.gitignore

Remove trailing space

Updated link in Node.gitignore

Updated link for the dependency directory from [this](https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git) to [this](https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git-).

(TeX) Exclude files generated by using backref.

Update JetBrains.gitignore

Adding *.publishproj to ignore

This files is generated by Visual Studio 2013 and should be ignored.

```
data/: This directory provides a place to store application data that is volatile and possibly temporary. The disturbance of data in this directory might cause the application to fail. Also, the information in this directory may or may not be committed to a subversion repository. Examples of things in this directory are session files, cache files, sqlite databases, logs and indexes.
```

As per docs...

http://framework.zend.com/manual/2.3/en/ref/project.structure.html

When doing \usepackage[backref]{hyperref} the pages of the references are shown in the bibliography.
Those files can be safely ignored.

Info: http://tex.stackexchange.com/a/7772/828