Creates bootstrap.php.

Centralizes bootstraping to a file, declaring NEMEX_PATH constant as the
root path of the project.

Adds a function to normalize file paths to the current operating system.

Disable error display and enables error logging to the root of the
application.
Ignores log, project and OSX cache files.
Add requirements on README.

Removes old README and fixes LICENSE ownership to nemex.io.
Add Vagrantfile for development support.

This brings up a virtual machine with all the requirements to run the
project, easing execution and development.
Adds a file to test the installation.

It is a very basic test suite, which tests for the requirements for
running Nemex.