Added Mod Request System

[Guichaguri]

This PR adds a mod request system.

• List of mods with an upvote button
• Can only upvote one time per IP
• Let you submit requests
• Prevent invalid URLs or duplicated names/URLs
• Messages for user feedback
• Prevent XSS Injection

There are some reasons why I used JSON instead of a custom format:

• In some cases: faster parsing
• The values are better encoded
• Less code
• Compressed Data

To reset, just replace everything in the JSON to []. If you need a decompressed JSON to remove the values, just paste everything on JSON Formatter

[Guichaguri]

I just fixed a security issue and added the sender's IP, the time (in unix timestamp) that the suggestion was sended and a limit of 3 suggestions per day for each IP. It should help prevent spamming.
After this PR, I'll create another one fixing some HTML deprecated/invalid tags.

Just tell me if I should add something else

[steveowashere]

Looks exactly like what I had in mind. Really top notch work.

From what I can understand, the code looks good too.

[Guichaguri]

Thanks. It's not the perfect solution, but it is fast, safe and it works

[fewizz]

👍

[Xen1290]

Very good, but you should resolve merge conflicts @Guichaguri
@DZCreeper

[Guichaguri]

Everything fixed. @Xen1290 @DZCreeper