Merge branch 'v2.1rc2' into 'master'

Upgrade master to v2.1

Closes #16

See merge request !79
9 jobs for v2.1 in 6 minutes and 12 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed clang-c++11 #118315
Linux

00:02:29

passed cppcheck #118317
Linux

00:05:49

passed doc #118322
Linux

00:00:05

passed gcc-c++11 #118314
Linux

00:04:26

passed macos-c++11 #118316
Apple

00:02:56

passed VS2015-32-bit #118321
VS2015

00:01:23

passed VS2015-64-bit #118320
VS2015

00:01:31

passed VS2017-32-bit #118319
VS2017

00:01:21

passed VS2017-64-bit #118318
VS2015

00:01:30