Welcome Ray Gauss as a Tika committer/PMC

[Nick Burch]

Hi All

Many of you will have seen the JIRAs / patches from Ray Gauss over the 
last few months, especially around metadata. I'm pleased to announce that 
Ray has now been elected as a Tika committer and PMC member.

Ray, please feel free to say a bit about yourself. Thanks and welcome 
aboard! We'll look forward to you committing your own patches shortly :)

Nick