These headers are installed in the system but not officially supported
as they are considered as internal headers.
The reason why they still need to be installed is that
- they were exposed even in the previous releases.
- they are needed for widget customization (unofficially)
- or it will break ewe.
Special thanks to Stefan for the reporting.
Being annoyed by different types of eina critical macros - CRI, CRIT,
CRITICAL -, I concluded to unify them to one. Discussed on IRC and
finally, CRI was chosen to meet the consistency with other macros -
ERR, WRN, INF, DBG - in terms of the number of characters.
If there is any missing bits, please let me know.