Complete refactor of library

Today I've completely refactored the library in order to make it usable for Symfony2 / Composer / Packagist. Please take a carefull look at my changes, please adopt them in order to give the Saaspose PHP-library its continuity!

A lot of code-styling changes have been made, but beside that:
+ added namespaces 
+ added use instead of the 'require' function
* separated files with multiple classes (like the Php/Response class)
* put double "**" at the annotation/comment of a class
* function / class bracket opens at newline
* fixed usage of brackets at if / else / for / foreach statements
* removed Java code (?!)

TODO: /Cells/ is not completed entirely yet

Later this week I will complete the refactor. What I would like to ask you, is to test the library against the Saaspore service. Does the PHP library in this way still work? I found Java code, so has it actually functioned in the first case?