Merge branch 'no-boost' into 'master'

Fix build without boost

Closes #6

See merge request !41
6 jobs for master in 8 minutes and 10 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #80660
Qt551 VS2013
CoMISo-VS2013-Qt-5.5.1-x64

00:01:04

passed #80661
IPOPT3129 VS2017
CoMISo-VS2017-Qt-5.10.1-x64

00:01:16

passed #80658
Linux
clang-c++11

00:08:09

passed #80657
Linux
gcc-c++11

00:05:50

passed #80659
Apple
macos-c++11

00:04:47

 
  Deploy
passed #80662
trigger_build

00:00:00