Merge pull request #9 from hosmelq/master

spanish translations
Set page language based on App's locale
Replace instance of levels from config with new getLevels() method
Add psr/log to composer requirements
Test new getLevels() method
Fix dependancy issues
Remove psr/log dependency.

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - kmd/logviewer dev-master requires psr/log dev-master -> satisfiable by psr/log[dev-master].
    - kmd/logviewer dev-master requires psr/log dev-master -> satisfiable by psr/log[dev-master].
    - Conclusion: don't install psr/log dev-master
    - Installation request for kmd/logviewer dev-master -> satisfiable by kmd/logviewer[dev-master].
Revert "Remove psr/log dependency."

This reverts commit 255107819175ff484ea1d7eacef77134af8b9851.
Add PHP 5.5 to Travis tests.
Add build status image (back) to README.