Regex optimizations for web/.htaccess
updated version to 3.0
minor #733 Regex optimizations for web/.htaccess (GeertDD)

This PR was merged into the 3.0-dev branch.

Discussion
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Regex optimizations for web/.htaccess

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   |
| Fixed tickets |
| License       | MIT
| Doc PR        |

The idea is to not lose time matching things you don't need. So, instead of matching the whole URI with `.*` or even a single character via `.?`, you can just match the beginning of the string `^` and be done with it.

In the second regex, I created a non-capturing group `(?:___)` since that first match is not being referenced anywhere.

Commits
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4e3ee4b Regex optimizations for web/.htaccess
Added a new AppBundle to comply with Symfony Best Practices
feature #728 Added a new AppBundle to comply with Symfony Best Practices (javiereguiluz)

This PR was squashed before being merged into the 3.0-dev branch (closes #728).

Discussion
----------

Added a new AppBundle to comply with Symfony Best Practices

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #671
| License       | MIT
| Doc PR        | -

Symfony Best Practices recommend to start developing your applications with a single AppBundle bundle. This PR allows to include that AppBundle in the Symfony Standard Edition, to make it easier for developers.

I used the same skeleton as for the `generate:bundle` command, but I thought that it would be better to simplify it and remove the `$name` route parameter and use just a static template without parameters.

Commits
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45da0d0 Added a new AppBundle to comply with Symfony Best Practices
Merge branch '2.7'

* 2.7:
  feature #728 Added a new AppBundle to comply with Symfony Best Practices (javiereguiluz)
  fixed Symfony version dep
  updated VENDORS for 2.6.0-BETA2
Merge branch '2.7'

* 2.7:
  Fixed SensioDistributionBundle requirements
  updated VENDORS for 2.5.8
Merge branch '2.7'

* 2.7:
  updated VERSION in README
  changed version to 2.3 in the README
  Removing installation instructions
updated VERSION in README
Merge branch 'master' into requirejs