Provide a conanical header installation path

[cheese]

Upstream iniparser does not provide a 'make install' support. Downstream distributions may install the header files to different places.
For example, Ubuntu installs header files to /usr/include/iniparser but Fedora installs them to /usr/include directly.
It would hard for distributions to negotiate with each other to decide a common path. It's better for upstream to make this decision.

[lmoellendorf]

Please have a look at iniparser-meta.
Feel free to add an issue there if it does not fit your needs.