Moved check for pointer variables into isVariableDeclaration()
Can now handle multiple scopes and multiple levels of indirection. Simplified check for strucs and unions, too, reducing the size of getVarList().
skipScopeIdentifiers() and skipPointers() should probably be methods on class Token.
symboldatabase now recognises variables with arbitrarily many scopes.
Extracted method isVariableDeclaration()
Added unit tests for isVariableDeclaration in new file testsymboldatabase.cpp
Extracted givenACodeSampleToTokenize helper class into testutils.h to reduce duplication.
