added grace support
fixed whitespace
Interpreter for PHP
Fixed support for "BlitzMax"

- language was already defined but missed "type: programming", so detection of "BlitzMax"-files did not work. Fixed that.
- added "BlitzMax"-example to samples (and recreated samples.json)
use Alloy lexer
Update README.md
Merge pull request #1331 from GWRon/master

Fixed support for "BlitzMax"
Samples
Merge pull request #1333 from spderosso/alloy-lexer

use Alloy lexer
Merge pull request #1325 from pchaigno/interpreter-php

Interpreter for PHP
Merge branch 'master' into 1323-local

Conflicts:
	lib/linguist/samples.json
Merge pull request #1337 from github/1323-local

1323 local
Add a multitude of Forth file extensions.
Yes, these are all in use.
Add Groff sample.
Update samples.json.
Make test_pedantic accept quotes around extensions.