Fixed typo to render note block

There was a space missing between `..` and `note` which leads to a code block instead of a note.
merged branch WouterJ/patch-2 (PR #167)

This PR was merged into the 2.1 branch.

Commits
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76def86 Fixed typo to render note block

Discussion
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Fixed typo to render note block

There was a space missing between `..` and `note` which leads to a code block instead of a note.
Added a link to information on how to activate annotated routes to the Bundle main page

Bundle review page should give a complete general idea on how to use annotated routing, but it doesn't say about how to activate annotated routing. Developer had to read further to find required information.
merged branch vdroznik/2.0 (PR #180)

This PR was merged into the 2.0 branch.

Commits
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51b7ffb Added a link to information on how to activate annotated routes to the Bundle main page

Discussion
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Documentation: Add information on how to activate annotated routes to main page

Bundle review page should give a complete general idea on how to use annotated routing, but it doesn't say about how to activate (import) annotated routing. Developer had to read further to find required information before.
Merge branch '2.0' into 2.1

* 2.0:
  Added a link to information on how to activate annotated routes to the Bundle main page
updated license year
updated license year
Merge branch '2.0' into 2.1

* 2.0:
  updated license year
DoctrineParamConverter should allow 0 as valid identifier
merged branch borisguery/id-0-should-not-throw-an-exception (PR #183)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #183).

Commits
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9c6b671 DoctrineParamConverter should allow 0 as valid identifier

Discussion
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DoctrineParamConverter should allow 0 as valid identifier

Use case:

* I've a route like `/items/{item}` where item is an unique number.

* If I try to fetch the item identified by a `0` it throws

 `\LogicException('Unable to guess how to get a Doctrine instance from the request information.');`

This is because in the `find()` method it "validates" the identifier as being not false but without strict type check resulting in `0` being evaluated to `false`, which is, strictly speaking, wrong.

[DoctrineParamConverter.php::find()](https://github.com/sensio/SensioFrameworkExtraBundle/blob/946f74bd4aa78b311c08b14f8a934ec30f20defd/Request/ParamConverter/DoctrineParamConverter.php#L71)

I wrote a test case which fails when using a 0 as an identifier and a fix using a strict type check to get ride of this.
Update composer.json

Bump dependency of doctrine common for symfony 2.1 users.
merged branch guilhermeblanco/patch-3 (PR #202)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #202).

Commits
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3fa2c5c Update composer.json

Discussion
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Update composer.json

Bump dependency of doctrine common for symfony 2.1 users.
Fixed build error 'WARNING: unknown document: annotations/routing#activation'