Initial Commit
Add 'bit_t' type class

# Version 0.0.1 [0.0.1D1 'Sorrel Black Tokyo']
# Changes in bit_type.h, bit_type.cpp
+ Add 'bit_t' type definition
	- various bit constructors and copy constructor
	- different type casts
	- logic operators 'set', 'reset' and 'invert'
	- overload both prefix and postfix increment and decrement
	operators
	- overload unary complement operators !, ~
	- overload binary operators ^, &, |
	- add binary operators nor, nand
	- overload assignment operator
	- overload compound assignment operators ^=, &=, |=
	- overload comparison operators ==, !=
	- overload relation operators >=, >, <=, <
	- enable binary output via 'toBinaryString()' method
	- overload ostream insertion via << operator
Merge branch 'master' of https://github.com/eight-dev/bitty

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