Update .gitignore for Symfony2

See https://github.com/symfony/symfony-standard/commit/e7b7b0f366465b15a29f44d7ba17287bb0b8392b

[Global/SBT] Fix documentation URL

Ignore phpunit.xml in Symfony2 applications

Mercury.gitignore: Add Erlang .beams,

Ignore locally-built `*.nupkg` files

additional compiler target, forgot to add this in
https://github.com/github/gitignore/pull/1057

Building NuGet packages locally with `NuGet.exe pack <name>.nuspec` generates a `<name>.<version>.nupkg` file which should never be versioned.

Zend Framework 2 gitignore file

Documentation rules have been removed and the rest of the rules are going to be included in the ZendFramework2.gitignore.

"TheFind Feed" module removed

According to [this](http://www.magentocommerce.com/magento-connect/thefind-feed-1.html) TheFind Feed module does not come with the latest versions of Magento( > 1.6).

Thank you

Adding .lock-wscript

Tweak comment in Node.js .gitignore file

Releases should also be ignored

Amending #1072

Update Gradle.gitignore

Update Gradle.gitignore

"Releases" directory is created by Shimmer/Squirrel installer for example. It also should be ignored.

I made some changes to the original pull request to remove complexity which
I believe was not needed.

From the discussion on #1013:

Since the rule in VS is packages/*, the fact that it contains a slash means
that it is anchored to the top level. That is, is will only apply to
a directory called packages at the top level, and not to any at deeper
directories like App_Data. So these rules at the bottom of your changes
actually aren't necessary after all. I just confirmed this with a quick test.

[Python] Remove rules for bin/, Mr Developer, and Rope