fixed typos
Trimmed trailing whitespaces
CS fixed in code samples
Fixed typos
Fixed API issues
Update modules.rst

Fixes fix/user-guide/modules issue #810
Converted options lists to tables
Merge pull request #829 from wryck7/fix-zend-tag

General fixes for Zend\Tag documentation
Merge pull request #826 from rkulla/patch-1

Update modules.rst. Close #810
Merge pull request #828 from wryck7/fix-zend-mvc

fixed some typos