Add KEYS file.

This contains public PGP keys we'll be using to sign releases.

Instructions are cribbed from the files used by Apache projects.
Merge pull request #38 from greboid/idea

Add an IDEA file
Merge pull request #37 from csmith/master

Add KEYS file.
Add JSR305 to util
Merge pull request #39 from greboid/master

Add JSR305 to util
Update CI to j8
Merge pull request #40 from greboid/java8

Switch CI to java 8
Change dependency rule for circle.
Merge pull request #41 from csmith/master

Change dependency rule for circle.
Change project language level.

Told you so, Greboid! ;)
Merge pull request #42 from csmith/master

Change project language level.
Merge branch 'master' of https://github.com/DMDirc/Meta into idea