This patch will make it possible to use the C++
Standard Library by removing the min/max macros
from the code.

The patch makes the following changes:

- Define macros MY_MIN and MY_MAX instead of min and max.
- Use MY_MIN/MY_MAX in C code
- Use MY_MIN/MY_MAX in array declarations
- Include <algorithm> to get min/max from std
- Add using-declarations in source files
- Use std:: prefix for min/max in header files
- Turning some constant declarations unsigned
- Removing an overloaded use of 'min' as both
  macro name and variable.
- It enables C++ builds for all files