Merge branch 'cleanup/installscript' into 'master'
Cleanup/installscript
Closes #848 (closed)
See merge request !1965 (merged)
(cherry picked from commit 7a6fd6d4)
acaf8100 [install] move and modify installscript b0775e20 [install][handbook] Modify the description of the quick install 14914915 [install][external] Add install course and lecture as options 204468d5 [bin][install] Fix several issues with installdumux.sh script ed7e6247 [install] add check for existing cmake.opts file