Merge pull request #210 from hintjens/master

Added note to clarify policy for embedded apps
Merge pull request #211 from hintjens/master

Was not showing ETERM properly
zmsg_load should return NULL if unable to load msg
Merge pull request #217 from claws/master

zmsg_load should return NULL if unable to load msg
inline not safe to use in czmq_prelude.h, removed
Revert "inline not safe to use in czmq_prelude.h, removed"

This reverts commit fe7fbf84d28cda6d28f7539ed7583211680d8bd1.
Revert "Removed definition of 'inline' for Windows"

This reverts commit b703c6134b373750cc885d5fd300e15f0fdb0459.
Safer fix for issue #212
Code cleanup for zhash_rename