[set ops][follow L/L] fix bug appearing in regression tests regarding dereferencing a non-dereferencable iterator
Merge pull request #9 from mkaravel/feature/setops

[set ops][follow L/L] fix bug appearing in regression tests
[point iterator] use the unit test framework library in unit tests (instead of include the test framework and compile it each time)
[set ops] remove #ifdef/#endif block used for debugging
[set ops] polish/simplify follow L/L code; change some vairable names that are confusing;
[test][algorithms][set ops] replace BOOST_CHECK by BOOST_CHECK_MESSAGE and in case of error output the two geometries, the expected and the computed results
[iterators] add missing includes; rename InnerRange to inner_range (coding standards);
Merge pull request #10 from mkaravel/feature/point_iterator

[point iterator] use the unit test framework library in unit tests
Merge pull request #11 from mkaravel/feature/setops

Feature/setops