[set ops][turns] compare turns using the fraction instead of the distance
[turns][debug] output the fraction value as part of the debug output
[set ops] degenerate turns have now method_none; update test for isolating points to check for this method
Merge pull request #16 from mkaravel/feature/setops

Feature/setops: fixes/changes due to recent changes in develop branch
Merge pull request #17 from mkaravel/develop

[recalculate] add missing include for boost typeof