[doc][release notes] updates additional features and fixed tickets
Merge pull request #90 from mkaravel/doc/release_notes

[doc][release notes] updates additional features and fixed tickets
[doc] Add relops and rtree info to the release notes
[algorithms][distance] add dispatch for the ring/ring combination
[algorithms][distance] add dispatch for the three multigeometry-to-ring combinations
[test][distance] add include for rings
[algorithms][distance] add test cases for the point/ring and multipoint/ring combinations
[test][distance] add test cases for the segment/ring and linestring/ring combinations
[test][distance] add test cases for the multilinestring/ring combination
[test][distance] add test cases for the combinations: polygon/ring,
multipolygon/ring, ring/ring and ring/box
Merge pull request #91 from mkaravel/feature/distance

Feature/distance
[simplify] protect work in progress by define because it is still failing
[buffer] Avoid accessing pieces if no pieces were added
Fix MSVC compiler warnings
This removes unused variables and redundant re-declarations to silence
warnings about variable shadowing. Tested on MSVC 14 CTP2.
Merge pull request #92 from MarcelRaad/develop

Fix MSVC compiler warnings
[relate] Add 'const' keyword to declarations of not modified variables.
[doc] add solved ticket 10077 to release notes
[multi][algorithms][num_points] add include for std::size_t;
qualify with std:: an occurrence of unqualified size_t;
[within][winding] Add more robust calculation of sides in winding strategy.

This commit fixes the ticket https://svn.boost.org/trac/boost/ticket/9628.
The side is calculated always WRT the vertical segment if the p<1> is "equal" to one of the segment endpoint's <1>.
For more information see the comment in the code.
Merge pull request #94 from mkaravel/fix/num_points

[multi][algorithms][num_points] replace size_t with std::size_t