Update ycmd fork for Rust support

[HybridEidolon]

Rust support is now merged into the upstream ycmd so for Atom to support it, the fork needs to merge those commits in. ycmd seems to have better support for Rust now than the existing Atom-specific plugins that call into cargo and racer directly.

[Qusic]

The upstream of ycmd has fixed the issues that I worked around in the fork and the fork is not needed any more. My winter vacation is coming soon and I will be able to work on it one or two weeks later.

[lilianmoraru]

The fork is not needed any more? Do you think we could compile it ourselves and it will work or you have to do some additional work?

[HybridEidolon]

For rust support there's some additional work needed, but it also seems like some API changes have happened underneath. I can't get the current version of the extension working with the latest ycmd, the daemon won't start.

[Qusic]

Now this package uses the original ycmd instead of my fork and it should work for all ycmd-supported languages.

[HybridEidolon]

Thanks!

[lilianmoraru]

Thank you!