Modifying Mirah search terms
Merge pull request #1383 from github/mirah-search

Modifying Mirah search terms
Most Xcode files have a human-readable diff now!
Actually let's keep those.
pbproj's are cool too.
Merge pull request #1385 from joshaber/master

XCodes
Add FORTRAN samples.
Add Forth extensions .f and .for; add heuristics for Forth and FORTRAN.
Update samples.json.