Run lint in separate Travis job

This should speed up execution as the lint job does not have to do any
installations.

Signed-off-by: Michal Čihař <michal@cihar.com>

.travis.yml

@@ -7,21 +7,31 @@ php:
 env:
   matrix:
     PHPUNIT_ARGS="--exclude-group selenium"
+    LINT="yes"
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq ant
 before_script:
-  - if [[ $TRAVIS_PHP_VERSION != "hhvm" ]] ; then
+  - if [[ $TRAVIS_PHP_VERSION != "hhvm" -a -z "$LINT" ]] ; then
     git clone git://github.com/zenovich/runkit.git && cd runkit && phpize && ./configure && make && make install && cd .. ;
     phpenv config-add test/travis.php.ini ;
     pear channel-discover pear.phpunit.de ;
     pear install phpunit/PHPUnit_Selenium ;
     fi
-  - composer install --dev --no-interaction
+  - if [[ -z "$LINT" ]] ; then
+    composer install --dev --no-interaction ;
+    fi
 script:
-  - ./scripts/generate-mo --quiet
-  - if [[ $TRAVIS_PHP_VERSION == "hhvm" ]] ; then ant phpunit-hhvm ; else ant phpunit ; fi
-  - ant lint
+  - if [[ -z "$LINT" ]] ; then
+    if [[ $TRAVIS_PHP_VERSION == "hhvm" ]] ; then
+    ant phpunit-hhvm ;
+    else
+    ant phpunit ;
+    fi ;
+    else
+    ./scripts/generate-mo --quiet ;
+    ant lint ;
+    fi
 after_script:
   - php vendor/bin/coveralls -v
 matrix: