Merge pull request #19 from mkaravel/develop

[policies][robustness] properly initialize m_approximation in default segment_ratio constructor
[get_turns] Fix turns generation for double collinear spikes.

Add check if a spike Point is realy an IP.
Merge branch 'develop' of github.com:boostorg/geometry into develop
[get_turns][extensions/dissolve] Fix VS compilation error (STATIC_ASSERT + template). Add not_implemented<> info to extensions/dissolve.
[extensions/dissolve] Fix compilation error - pass segment_ratio<> to traversal_turn_info<>. Remove mistankenly commited test change
check_result_type is missing inline qualifier

Function check_result_type is missing inline qualifier.
Merge pull request #20 from sdebionne/develop

check_result_type is missing inline qualifier
Merge branch 'develop' of https://github.com/boostorg/geometry into feature/setops