Added DisablePublicize, PublicizeOn and PublicizeOff attributes

Bumped version to 1.4 as well.
One thing missing is that the project using this plugin would need to reference it (to be able to use the new attributes).
PublicizeOn and Off are cascading style attributes. They affect current type/member and below unless there is another On or Off down the tree.
DisablePublicize is an assembly level attribute which disables publicize entirely. Useful for i.e. Release configuration if one doesn't want Publicize to run at all.