Added  in order to avoid filtering away parameters with zero values.
Added trim() to filter away parameters with only empty space(s).
Changed width and height to be unset from options also if they are empty strings.
Added test_no_empty_options() to test empty parameters and zero values. Fixed some typos.
Merge pull request #12 from Rade333/master

Allow parameters with zero values.
Merge branch 'master' of https://github.com/m0she/cloudinary_php
Cake - fixes