Minor release, changes from upstream:

- prefer noexcept over throw () with C++ 11.
- update ecb.h due to incompatibilities with c11.
- fix a potential aliasing issue when reading and writing
  watcher callbacks.

Signed-off-by: Karl Palsson <karlp@tweak.net.au>

Imports the latest version from the management feed, and fixes the
install paths.  All example code, and desktop linux expects and installs
libev's headers to /usr/include/<ev.h> not under a subdirectory.

Signed-off-by: Karl Palsson <karlp@tweak.net.au>