(bug 49312) Add a 'Programs' namespace to metawiki.

Re-submitting a patch originally submitted by Ori as
I2a1ade4 after securing community consensus.

Bug: 49312
Change-Id: I95a8785c7868a190dc085a2556df3828e54c84ab
Merge "(bug 49312) Add a 'Programs' namespace to metawiki."