Update 14.markmin

Fixing a very minor typo in the variable name when used in the explanation
cache.client, thanks Niphlod
merged Added URL arguments to get it working, thanks neoecos
Merge pull request #44 from spametki/master

Spanish translation: Mail and SMS
Merge pull request #46 from dpetzel/master

Fixing a very minor typo in the variable name when used in the explanation
Spanish: Chapter 04 update