Build/PHPCS: rename ruleset

If the PHPCS ruleset is named `.phpcs.xml`, `phpcs.xml`, `.phpcs.xml.dist` or `phpcs.xml.dist`, it will automatically be picked up by PHPCS and you don't need to pass the ruleset name anymore.

Additionally, using a `.dist` file for a repo ruleset allows for individual developers to overrule the ruleset with a custom version (without the `.dist` file extension).
This makes testing of new additions/changes to the ruleset easier.
The master ruleset can be imported into a custom ruleset by using `<rule ref="./.phpcs.xml.dist"/>`.

Since PHPCS 3.1.0, it is also possible to use dot-prefixed files for the PHPCS config, allowing these files to be sorted with other configuration related files.

The loading order of the ruleset files in PHPCS, as of version 3.1.1., is:
1. `.phpcs.xml`
2. `phpcs.xml`
3. `.phpcs.xml.dist`
4. `phpcs.xml.dist`

References:
* https://github.com/squizlabs/PHP_CodeSniffer/wiki/Advanced-Usage#using-a-default-configuration-file
* https://github.com/squizlabs/PHP_CodeSniffer/releases/tag/3.1.0
* https://github.com/squizlabs/PHP_CodeSniffer/releases/tag/3.1.1 (change in the file loading order)

.gitignore

@@ -35,3 +35,8 @@ svn
 # PHPUNIT #
 ###########
 build/logs
+
+# Local Dev files #
+###################
+.phpcs.xml
+phpcs.xml

.travis.yml

@@ -39,12 +39,11 @@ script:
   # -s flag: Show sniff codes in all reports.
   # -v flag: Print verbose output.
   # -n flag: Do not print warnings. (shortcut for --warning-severity=0)
-  # --standard: Use WordPress as the standard.
   # --extensions: Only sniff PHP files.
-  - vendor/bin/phpcs -p -s -v -n ./*.php --standard=./phpcs.ruleset.xml --extensions=php
-  - vendor/bin/phpcs -p -s -v -n ./**/*.php --standard=./phpcs.ruleset.xml --extensions=php
-  - vendor/bin/phpcs -p -s -v -n ./**/**/*.php --standard=./phpcs.ruleset.xml --extensions=php
-  - vendor/bin/phpcs -p -s -v -n ./**/**/**/*.php --standard=./phpcs.ruleset.xml --extensions=php
+  - vendor/bin/phpcs -p -s -v -n ./*.php --extensions=php
+  - vendor/bin/phpcs -p -s -v -n ./**/*.php --extensions=php
+  - vendor/bin/phpcs -p -s -v -n ./**/**/*.php --extensions=php
+  - vendor/bin/phpcs -p -s -v -n ./**/**/**/*.php --extensions=php
 
 after_script:
   - php vendor/bin/coveralls

build.sh

@@ -41,6 +41,7 @@ rm .jscsrc
 rm .jshintignore
 rm .jshintrc
 rm .jhintrc
+rm .phpcs.xml.dist
 rm .simplecov
 rm .travis.yml
 rm CODE_OF_CONDUCT.md
@@ -49,7 +50,6 @@ rm -rf vendor/
 rm example.php
 rm Gruntfile.js
 rm package.json
-rm phpcs.ruleset.xml
 rm phpunit.xml
 rm phpunit.xml.dist
 rm README.md