allow usage of a closure for the `code` option of fields
optimization to call `$this->getOption('code')` only once
Removed non-needed import from a doc
Added YAML route builder defn sample
Added YAML config samples in advance.rst
Renamed "advance" to "advanced"
Fixed doc title
Merge pull request #1961 from kix/master

Added YAML config examples, some fixes
Added doc & unit tests
Merge pull request #1962 from Bladrak/craueCode

Added documentation & unit tests to PR #174
Revert "Added doc & unit tests"

This reverts commit 9c88fcc10acd8fffec42fab20b45ede9b7fa4289.
Revert "allow usage of a closure for the `code` option of fields"

This reverts commit 57e929e4eb023beaad154b122705e177a6b6f064.

Conflicts:
	Admin/BaseFieldDescription.php
Revert "optimization to call `$this->getOption('code')` only once"

This reverts commit 451616fa6550199c1d089de9ba9952556e6c8f5e.

Conflicts:
	Admin/BaseFieldDescription.php
Fixed hyperlinks in the doc
Merge pull request #1965 from kix/doc-fixes

Fixed hyperlinks in the doc
Migrate composer.json to psr4
Fix autoload path
Update autoload.php.dist
Remove @dev version of core-bundle
Merge branch 'sonata-project/master'

Conflicts:
	composer.json