Minor - Memory limit change attempt for composer executing in travis

.travis.yml

@@ -31,12 +31,12 @@ before_install:
   #- sudo apt-get install -qq php5-cli php5-fpm
 
 before_script:
-  - composer self-update
+  - php -d memory_limit=2G /usr/bin/composer.phar -v update
   # Previously, fxp/composer-asset-plugin was required but was causing a lot of trouble updating. Now it's disabled.
   #- composer global require "fxp/composer-asset-plugin:1.0.3"
   # You can either use the composer install method and face the Github limit
   #- composer install -n
-  - composer update
+  #- composer update
   # ...OR you can try the option --prefer-dist, that will reuse composer packages cache
   #- composer update --prefer-dist
   # ...OR you can try the --prefer-source option to download from source whenever it's possible (but it's much slower)