Now compiling with -std=c++11

The code compiles with -std=c++11.  To avoid conflicts, isnan has to be
changed to std::isnan.
No more dep. convs. from const string to char*

stEspecies.Nombre is now a std::string, as well as tzstr.
New Math_wam lib for smaller compile times.
No more -Wsign-compare warnings.
Doxygen: html and pdf.
Using OpenMP. Parallel CalculateFlowIndependent().

Using BUILD_PARALLEL as an option to use OpenMP.  It is set OFF as
default, and searchs for OpenMP if set to ON.
The pipe is solved in three threads in CalculateFlowIndependent.
PRef should be 1.0 bar instead of 0.997 bar.

Conflicts:
	Source/Includes/Constantes.h
Reference temperature.
pow025, pow075, pow150.
Using pow2 and company everywhere.
Simpler CMakeLists.txt.

I've removed the include_directories commands from all the subdirs.
They were needed before because we were using first add_subdirectory,
so the include_directories commands in Source/CMakeLists.txt
weren't evaluated before evaluating Source/subdir/CMakeLists.txt.  Just
resorting Source/CmakeLists.txt solves that problem and makes our lives
a little easier.

Conflicts:
	Source/1DPipes/CMakeLists.txt
	Source/Boundaries/CMakeLists.txt
	Source/CMakeLists.txt
	Source/CheckXML/CMakeLists.txt
	Source/Connections/CMakeLists.txt
	Source/Control/CMakeLists.txt
	Source/Engine/CMakeLists.txt
	Source/Extern/CMakeLists.txt
	Source/Math_wam/CMakeLists.txt
	Source/ODModels/CMakeLists.txt
	Source/Output/CMakeLists.txt
	Source/Turbocompressor/CMakeLists.txt
Improvement of the characteristics interpolation
Improvement of the path lines interpolation
#if -> #ifdef
Pressures unit constant converter.
Temperature unit constant converter.
Add Interpola_Caracteristica
New Labels lib.
Small bug in PutLabel.

We were still using LoadStr, which is currently being deprecated.
Project adapted for builder c++ X6
Everything is in ASCII now.
Not def gestorcom, graphicaloutput if not BORLANDC

Neither gestorcom nor graphicaloutput should be defined if
BORLANDC is not defined and they are checked using #ifdef.
New documentation for Cv, R and co. in Globales.h.