reorganised classes and tests a little bit
fixed test with number generator
added birthdate method
another refactoring with constructors
added new methods and tests - internet and contact parts
added method and test for mac address
updated calendar class, added bsn and UUID number generators
added credit cards generation methods
divided tests into separate groups, added more methods
fixed bsn test
fixed color test
added location class
added location methods and extended contact class
extended contact and location classes
fix tests, add Mobile class
refactored calendar class
finished Calendar class updating and covering with tests
added travis support. fixed calendar class