The method was either returning true or throwing an exception, so it can
simply return void or throw an exception.

This is closer to value_type which is used in STL containers.

They are virtual, currently not needed and only complicate things.

Tests for Vector<MultiPrecision> were removed by TO...

Implemented Array:containsOnlyValue.
Restored implementation of ArrayOperations::memoryCompare on host.

Implemented a method Array::checkValue which returns true only if there is an element with given value in the array.

2) Quad - typo repaired
3) Quad, MultiPrecision added to VectorTest.h

- separate data types for input arrays of binary operations
  (necessary for the equality comparison of two arrays of different
  type)
- added separate template parameter for ResultType, which defaults to
  the RealType
  (the goal is to allow sum of bool vectors into int instead of bool)

Long live clang for pointing this out!

Standard CMAKE_CXX_FLAGS are a space-delimited list, but our
CXX_TESTS_FLAGS are manually passed to CUDA_ADD_EXECUTABLE, which
expects a semicolon-delimited list. Blame cmake for such a crazy
language...