Refactoring for execution policies

Brief summary of changes:

• Removed MIC support
• Refactored VectorFieldVTKWriter
• Reimplemented getType() function using typeid operator and removed useless getType() methods
• CUDA:
  • Moved (most of) static methods from TNL::Devices::Cuda as free functions into separate namespace TNL::Cuda
  • Moved synchronization of smart pointers from Devices::Cuda into TNL::Pointers namespace as free functions
  • Moved atomicAdd function from Devices/Cuda.h into Atomic.h
  • Removed duplicate TransferBufferSize constants (addresses #26 (closed))
• Moved SystemInfo class out of the Devices namespace
• Benchmarks: added benchmarks for array copy and compare using memcpy and memcmp
• ArrayOperations:
  • using more parallel algorithms and suitable sequential fallbacks
  • added missing methods for the static/sequential specialization
  • Split ArrayOperations into MemoryOperations and MultiDeviceMemoryOperations
• Moved algorithms from TNL/Containers/Algorithms/ to just TNL/Algorithms/
• Serialization in TNL::File: File::save and File::load are specialized by Allocator instead of Device
• Added Devices::Sequential and corresponding specializations in TNL::Algorithms
• Enforced builds without (more or less) any warnings
• Removed Containers::List because it has no benefits over std::list