Update checker

[Vankerkom]

CCLoader should add a update checker to notify the users that a new version has been released.

[2767mr]

There are pros and cons to this that need to be discussed before implementing this (or not)

CCUpdaterCLI/ CCUpdaterUI resolves this issue.

[dmitmel]

@Vankerkom CCUpdaterUI is not ready. Began writing a literal update checker in https://github.com/dmitmel/cc-mod-version-checker