Merge pull request #346 from hintjens/master

Simplified zproxy
Merge pull request #347 from hintjens/master

Cleaned up zbeacon
Added comment to txp socket init, fixes #348
Selfishly added myself to AUTHORS
Merge pull request #349 from ulikoehler/fix348

Added comment to txp socket init, fixes #348
Merge pull request #352 from hintjens/master

Various small fixes
Merge pull request #354 from hintjens/master

Fixed issue #353 and other things
zloop_timer: correct documentation of return value
Merge pull request #355 from mhaberler/zloop_timer-doc-fix

zloop_timer: correct documentation of return value
simple cleanups
Merge pull request #356 from claws/fix_zconfig_in_readme

simple cleanups
the real fix
Merge pull request #357 from claws/fix_zconfig_second_attempt

the real fix
zsys_interface: use default value from an environment variable if supplied.
zbeacon: check ifa_flags when scanning interfaces
Merge pull request #358 from mattconnolly/master

zsys_interface: use default value from an environment variable if supplied.
Merge pull request #359 from mattconnolly/interface-detection

zbeacon check ifa_flags to filter list of interfaces
zloop: clarify argument of zloop_timer_end()
Merge pull request #360 from mhaberler/master

zloop: clarify argument of zloop_timer_end()
libsodium fix as long a it is still broken