Interface of vertex and its successors
Now new basic interface is tested
Ptr is inlcuded into vertex now
Some syntax fixes
Fixed problem with Null Vertex & Nonterminal vertex hash realization
Refactored inspector realization
Forgot to add src/slp.cpp
Fixed problems with dependencies for unittests
Inspectors are tested
Now the length of all left siblings of current vertex is calculated right
Added convertion of Vertex to bool cheeking if Vertex is Null
Fixed problem with vertex comparison & added  operator
Some refactoring for more clear behaviour
The word produced by vertex
Use c++11 explicit type convertion for safe bool
Fixed bug in inspector's go_to_position
Class FiniteArithmeticSequence
Added #pragma once directive
Added inspector::TaskAcceptor, bacuse it is very bad to call virtual functions in constructors
Changed plain pointer to unique_ptr for Inpsector::task_checker_