Remove requests package and add it as a dependency in setup.py

[matiskay]

There's not need to include request module inside the project. It's better to add it to the list of dependencies in setup.py.

    install_requires=[
        'requests',
    ],

We also need to update the package in pypi.

[coveralls]

Changes Unknown when pulling 4b03c22 on matiskay:remove-packages-dir into * on maxtepkeev:master*.

[maxtepkeev]

It was like that until 1.5.0, starting from 1.5.0 it is bundled for a reason, see #109 and this.