Changing constant value to small case

Currently, field constants have upper-case value.
eg.

public static const THUMBNAIL_URL:String = "THUMBNAIL_URL";

However, according to the spec, the value has been standardize to lower-case.

An excerpt of the spec on http://wiki.opensocial.org/index.php?title=Opensocial.Person_(v0.8)

opensocial.Person.Field.THUMBNAIL_URL

Person's photo thumbnail URL, specified as a string. This URL must be fully qualified. Relative URLs will not work in gadgets. This field may be used interchangeably with the string 'thumbnailUrl'.

So we will start changing the value to lower case soon.


eg.

public static const THUMBNAIL_URL:String = "thumbnailUrl";