Bump to version v0.18
Bump to version v0.18

This fixes a channel sorting bug which has caused compatibility issues,
in case the local and remote libiio differed in version.
This will revert the channel sorting changes and thus restore backward
compatibility to v0.15 and before. Version 0.16 and 0.17 should not
be used.

Changelog:

f331535 sorting: Use old sorting algorithm for channels
826563e CI/travis/lib.sh: fix triggering multiple builds
cce2ee2 CI/travis/inside_docker.sh: handle lowercase `ci` dir
f06a730 CI/travis/jobs_running_cnt.py: count `created` states as well
ed5ddb2 build,.travis.yml: drop xcode 8 build
f24c618 CI/travis/lib.sh: make the build dir configurable
f79c01b CI/travis: disable debug tracing
b7c1584 CI/travis/lib.sh: rework artifact removal via SFTP
1e23f69 CI/travis/lib.sh: add echo_[red,green,blue] functions

Adrian Suciu (1):
      sorting: Use old sorting algorithm for channels

Alexandru Ardelean (8):
      CI/travis/lib.sh: add echo_[red,green,blue] functions
      CI/travis/lib.sh: rework artifact removal via SFTP
      CI/travis: disable debug tracing
      CI/travis/lib.sh: make the build dir configurable
      build,.travis.yml: drop xcode 8 build
      CI/travis/jobs_running_cnt.py: count `created` states as well
      CI/travis/inside_docker.sh: handle lowercase `ci` dir
      CI/travis/lib.sh: fix triggering multiple builds

Michael Hennerich (1):
      Merge pull request #269 from analogdevicesinc/sort-old-reorder

Signed-off-by: Michael Hennerich <38f18d03059a1bc88082b55d7ca2d9b1ebfaffe0@analog.com>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio