Merge pull request #33 from berendbaas/develop

Some updates.
Update pdbc->query()

small update that makes it possible to chain query with fetch.

$result = $pdbc->query($query)->fetch();
Updated lib/core classes readability

Some comments, variable & function names are updated to improve
readabilty.
Update Guide class error message
Added isParsable() functionality to lib/core
Merge pull request #34 from berendbaas/develop

Refactoring and CMS functionality