This pull request fixes #166 and "silently" adds support for three different textOrigins. Namely "top", "center" and "bottom".
fix Firefox textOrigin (vertical alignment)
Merge branch 'master' into text-origin
Make "alignment-baseline" an inline style instead of presentation att…
Make "textAnchor" an inline style instead of presentation attribute.
Allow "top", "bottom", "center".
Cache isArray property lookup.
The reason why I propose "textOrigin" being a "silent" or non-public addition is because we're probably changing the behaviour of Text in the future due to #84. IMO making "textOrigin" public would conflict with the idea of exposing a "verticalAlign" API. Could be that the Text API ends up being kind of a TextBox API.