Updated 2 Mongo function calls 

Updated the Mongo function calls to work with the latest version, as follows:  

Changed `new Mongo()` to new `MongoClient()`  
Changed `$mongo->selectDb()` to `$mongo->selectDB()`
correct title section too short error in build
Correct spelling and adjust title length
Correct spelling and/or adjust title sections
Properly escape character
Add missing section to es version of volt docs
Corrected spacing in table
Merge pull request #388 from unisys12/Correct-Misc-Build-Errors

Correct misc build errors
API update
Update models.rst
Update request.rst

fix Slip of a pen
Merge pull request #389 from Chameleon-m/patch-5

Update models.rst
Merge pull request #390 from 9466/patch-1

Update request.rst
Ip validator fix
Merge pull request #391 from mruz/patch-1

Ip validator fix
fix & update russian docs
fix
Added specific installation instructions for debian with php5-fpm
Fix incorrectly formatted code block from previous commit
Merge pull request #387 from aaaqqqq/patch-1

Updated 2 Mongo function calls