further include untangling, chops 5sec compile time

Algorithms/DouglasPeucker.cpp

@@ -36,7 +36,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <cmath>
 
 #include <algorithm>
-#include <limits>
 
 struct CoordinatePairCalculator
 {

Algorithms/DouglasPeucker.h

@@ -29,6 +29,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define DOUGLASPEUCKER_H_
 
 #include <stack>
+#include <utility>
 #include <vector>
 
 /* This class object computes the bitvector of indicating generalized input
@@ -38,7 +39,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * bit indicating if the points is present in the generalization.
  * Note: points may also be pre-selected*/
 
-struct FixedPointCoordinate;
 struct SegmentInformation;
 
 class DouglasPeucker

Algorithms/PolylineCompressor.cpp

@@ -26,7 +26,9 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 #include "PolylineCompressor.h"
-#include "../Util/StringUtil.h"
+#include "../DataStructures/SegmentInformation.h"
+
+#include <osrm/Coordinate.h>
 
 void PolylineCompressor::encodeVectorSignedNumber(std::vector<int> &numbers, std::string &output)
     const

Algorithms/PolylineCompressor.h

@@ -28,8 +28,9 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef POLYLINECOMPRESSOR_H_
 #define POLYLINECOMPRESSOR_H_
 
+struct SegmentInformation;
+
 #include "../DataStructures/JSONContainer.h"
-#include "../DataStructures/SegmentInformation.h"
 
 #include <string>
 #include <vector>