Htag

- add `tag["style"].__contains__ & __len__`
- add `tag["class"].__contains__ & __len__`

- add `tag["style"].dict.update( dict )`

- it works better now ;-)

- The "DevApp runner" is able to print in stdout (no more python buffering !!!!!) <- really needed for me ;-)
(it's now the perfect runner for dev process !!!)
- "style" and "class" are now specials attributs (htag.attrs.StrStyle & htag.attrs.StrClass) on a Tag.
which provides methods to manage contents (respectivly "dict" & list) !
But works in the old/classic way, with str !

- "DevApp runner" upgraded ! (popup with skip/refresh & full error traceback (py only))
- meanwhile HRenderer can set special statics list with param statics.

- "DevApp runner" specialized for dev (autoreload/autorefresh/log)