Reimplemented Config::ConfigDescription and Config::ParameterContainer using std::vector instead of TNL::List

This is much safer and simpler because it solves many problems due to
cyclic inclusion of TNL headers.

Nina Džugasová authored 6 years ago and Tomáš Oberhuber committed 6 years ago

Added ConfigDescription documentation and added small changes in Object, Math and ParameterContainer.

Added ConfigDescription documentation and added small changes in Object, Math and ParameterContainer.

This got broken in commit 6c4b6f28

- Add Template abstraction to MPIIsend and MPIIRecv
- Distributed Grid Synchronizer is now indipendend on DOF datatype (bound to basic C types, types known by MPI)
- Distributed Grid Synchronizer now uses WaitAll function.

- base class with non-virtual destructor causes undefined behaviour
- missing return statements at the end of non-void functions
- missing const before char* function argument
- reordered initialization of class members
- misleading indentation after for statement
- fixed use of uninitialized variables
- fixed unsequenced modification and access to variables (the C++
  standard does not define the evaluation order of operands, so
  expressions with side-effects such as j++ cause undefined behaviour)