Swiftvipergenerator

Went to Beta stage!

**Added:**
* [PEP484](https://www.python.org/dev/peps/pep-0484/) and [PEP3107](https://www.python.org/dev/peps/pep-3107/) conformance
* `--initfile`/`-i` option for `init` command that will create default settings file
* greeting message in case swivigen was called without arguments

**Improved:**
* readme and basic docs

**Fixed**:
* bug when targets were chosen incorrectly (issue fixed on mod-pbxproj side)

**Added:**
* Interactor delegate protocol and Presenter conformance to this protocol
* Option that regulates base controller for ViperController

**Changed:**
* Now `swivigen` contains two separate commands for initializing and files adding (`init` and `add` respectively)
* Controller template name changed from `ViewController` to `Controller`

**Fixed:**
* Absent Colorama package in setup.py requirements

**Added:**
* tab bar support
* option that specify storyboard name to be used for created view controller
* option that specify targets to which newly created files will be added

**Improved:**
* Router `setup` method is not static anymore

**Fixed:**
* bug when Common folder was not copied inside project folder