nodes method accepts String too for tag name

[maiha]

Adding two methods in order to accept String for node tag names

Myhtml::Parser#nodes(tag_str : String)
Myhtml::TagsIterator#nodes(tag_str : String)

aimed to be called with arbitrary string by cli application like

% parse-css div foo.html

[kostya]

thanks

[kostya]

btw, i plan to use css selectors from Modest project based on myhtml, example: https://github.com/lexborisov/Modest/blob/master/examples/selectors/selectors_low_level.c

[kostya]

https://github.com/kostya/modest

[maiha]

Awesome! Cool! 👍