Easier customization

[jo-so]

I would like to customize some cycles and especially depending on the current major mode.

One global change I would like to make is in the space cycle replacing THIN SPACE with THIN NO-BREAK SPACE. And for HTML and Markdown I would like to cycle through ("&lt;" "<" "«" "‹") with <, but only in these modes.

This would be much easier if the cycle lists would be variables which can become buffer local.