Move the definitions to zm_define.h and include the header at the appropriate locations.
These macros have not been adopted by the C++11 standard.
However glibc 2.17 (CentOS 7) still depends on them to provide the macros which are guarded by these defines.
With this commit a unified structure for includes is introduced.
The general rules:
* Only include what you need
* Include wherever possible in the cpp and forward-declare in the header
The includes are sorted in a local to global fashion. This means for the include order:
0. If cpp file: The corresponding h file and an empty line
1. Includes from the project sorted alphabetically
2. System/library includes sorted alphabetically
3. Conditional includes
Peter Keresztes Schmidt
Isaac Connor