Rename QueryFormatter to FormFormatter

[gabteles]

In order to provide more semantic names, rename:

• TotalFlex\Interfaces\IQueryFormatter to TotalFlex\Interfaces\IFormFormatter
• TotalFlex\QueryFormatter\* to TotalFlex\FormFormatter\*

[hugoofab]

if interface QueryFormatter is inside the folder "Interfaces" why it have to carry "I" prefix? the classes that will implement these interfaces will use namespaces, so we'll not have any conflict with class names

[gabteles]

When created, it was on the main namespace. Now we don't need it more.