FormHelper : use the empty option for radio buttons
remove 'empty' option from  once checked
add tests for the 'empty radio option' feature
Coding standards cleanup.

Fix coding standards
Simplify addition of empty.
Add doc block for new feature.
Fix coding standards warnings.
Fix a few code standards errors.
Merge remote-tracking branch 'ceeram/2.2-hash' into 2.2-hash
Fix whitespace and remove duplicate method calls.
Fix notice errors with postgres.
Update doc blocks for CakeNumber.
Fix indentation
Ensure L10n::get() consistently returns the set language. Closes #2737
Fix whitespace errors.
Fix coding standards errors.
Added "missing" comma after smtp log option.

Signed-off-by: mark_story <mark@mark-story.com>
Fix doc of DboSource->$_queryCache.
Merge pull request #603 from luisarmando/queryCacheDoc

Fix doc of DboSource->$_queryCache.
Fix missing Html escaping on string urls for assets.

Add HTML escaping for asset paths provided as strings.
Split existing tests up.

Fixes #2766
Fix failing test.
Merge branch '2.1' into 2.2

Conflicts:
	lib/Cake/Test/Case/Network/Email/CakeEmailTest.php