[buffer][fix] Fix limit for consideration as continue, as it was too high
(for Aimes test or in general cases using lat long)
Including addition of unit test (aimes181)
[comments] fixed typos
[side] removed unused method
[buffer][test] enhanced svg debug display
[buffer][test] count only if self IP's are reported (has_self_intersection does
additional checks)
Merge branch 'develop' of github.com:boostorg/geometry into develop