Support multiple attributes

[dogancelik]

Hello, I needed to show multiple attributes so I made some changes. I added an extra argument "attribute separator" for separating the attributes (defaults to space).

Example:

$ htmlq -f download.html input -a name -a value -s =
Itemid=107
submit=Download
license_agree=1
download=431

Thank you for creating htmlq 🙏

[realies]

@mgdm

[mgdm]

Sorry I missed this! I like it, I'll look at getting it merged soon