Delta Updates for mods hosted at Github

Users: Prerequisite in order to check and preform updates

• when you extract the mod archive, make sure that every mod have extra top-level directory

Modders: how to enable:

Simply add mod metadata file and fill 'Download = ' keyword with the link to you github repository: https://github.com/ALIENQuake/ProjectInfinity/wiki/Adding-metadata-for-mod

How Delta Updates works?

Delta Updates will only download mod changes, not the whole mod again.
Because it's github-based, it offers stability and consistency. It's impossible to download partial
files: you either download it correctly or don't download it at all, it's how git itself works internally.

How the update from supported websites is preformed:

• the update process don't modify mods inside game directory, only the directory where user has extracted it
• update process can be only initiated by player himself, in order to not break desired install state
• user-created files inside mod folder are untouched

Which update channels would be offered for players:

• if mod doesn't have any releases or prereleses, offer updates for each new commit
• if mod has releases, offer to update only if there is a new release
• if mod has only prereleases, offer updates for new prerelease
• if mod has both releases and prereleases, offer updates for releases only, do not offer the update for new prereleases unless there is a global option "Allow for prereleases" enabled