[development] tagadelic 'backport' for 4.7

[Moshe Weitzman]

Bèr Kessels wrote:
> Hello,
> 
> I am receiving the first patches to make tagadelic ready for 5. However, till 
> today, I managed to keep tagadelic HEAD running very fine on 4.7. It got 
> loads of nice features, improved code, and revised, more modular APIs. 
> branch 4.7 tagadelic, and HEAD tagadelic are not compatible, so if I simply 
> overwrite the 4.7 branch with tagadelic HEAD I will break a lot of people's 
> sites.

the usual way to manage this in 4.7 and beyond is with hook_update() 
functions in your .install file. sometimes updates need some explaining, 
which i do in the commit message and in the readme file. you could also 
conceivably do a form_alter() on the update page in order to communicate 
stuff or gather settings.