Add KEYS with public code signing keys

[heuermh]

@fnothaft you may append your code signing key to this file with

(gpg --list-sigs <your name or id>
             && gpg --armor --export <your name or id>) >> KEYS

as described in the header.

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/ADAM-prb/1282/
Test PASSed.

[fnothaft]

Opened heuermh#3 with my key.

[heuermh]

Should I now rebase this to remove the Merge pull request commit?

[fnothaft]

@heuermh I can merge it manually; no sweat!

[fnothaft]

Merged as c871850 and 181bb8f. Thanks @heuermh!

[heuermh]

Woot!

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/ADAM-prb/1286/

Build result: FAILURE

[...truncated 24 lines...]Triggering ADAM-prb ? 2.3.0,2.10,1.3.1,centosTriggering ADAM-prb ? 2.3.0,2.10,1.5.2,centosTriggering ADAM-prb ? 2.6.0,2.10,1.6.1,centosTriggering ADAM-prb ? 2.6.0,2.11,1.3.1,centosTriggering ADAM-prb ? 2.6.0,2.10,1.3.1,centosTriggering ADAM-prb ? 2.6.0,2.10,1.4.1,centosTriggering ADAM-prb ? 2.6.0,2.11,1.6.1,centosTriggering ADAM-prb ? 2.3.0,2.10,1.4.1,centosTriggering ADAM-prb ? 2.6.0,2.11,1.4.1,centosADAM-prb ? 2.3.0,2.10,1.6.1,centos completed with result FAILUREADAM-prb ? 2.3.0,2.11,1.4.1,centos completed with result FAILUREADAM-prb ? 2.3.0,2.11,1.3.1,centos completed with result FAILUREADAM-prb ? 2.3.0,2.11,1.6.1,centos completed with result FAILUREADAM-prb ? 2.3.0,2.11,1.5.2,centos completed with result FAILUREADAM-prb ? 2.3.0,2.10,1.3.1,centos completed with result FAILUREADAM-prb ? 2.3.0,2.10,1.5.2,centos completed with result FAILUREADAM-prb ? 2.6.0,2.10,1.6.1,centos completed with result FAILUREADAM-prb ? 2.6.0,2.11,1.3.1,centos completed with result FAILUREADAM-prb ? 2.6.0,2.10,1.3.1,centos completed with result FAILUREADAM-prb ? 2.6.0,2.10,1.4.1,centos completed with result FAILUREADAM-prb ? 2.6.0,2.11,1.6.1,centos completed with result FAILUREADAM-prb ? 2.3.0,2.10,1.4.1,centos completed with result FAILUREADAM-prb ? 2.6.0,2.11,1.4.1,centos completed with result FAILURENotifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'
Test FAILed.