LI renders elements, require relative paths and fix logs

[GStudiosX2]

1. fix where's logs don't show if log messages contains markup characters
2. li now renders HTML elements (fixes BUG: List items disappear when they contain a link #169)
3. require now supports relative paths
4. file URLs should work on both windows and Linux
5. value attribute for input
6. do not request to DNS for file urls (http/https as well)
7. add set_inner_html and append_html (closes Feature request: function to edit inner HTML #81)

known issues

1. I haven't tested but I believe when you use set_inner_html it won't remove the tags for previous elements that don't exist anymore
2. Docs need to be updated

[GStudiosX2]

Oops accidentally deleted Cargo.toml for that commit