WIP - bilinear interpolation.
Cleaned up in reproject files.
Wrote own tests for bilinear interpolation. Also squashed bug in reader.
Cubic interpolation functionality implemented and tested.
Completed tests for cubic interpolation and cubic convolution interpolation. Also built ALA TDD tests for Akima Spline interpolation but haven't implemented it yet.
Akima cubic spline interpolation tested and implemented.
Average interpolation implemented and tested.
Mode interpolation implemented and tested.
All interpolations implemented and tested. Need some code revision. No benchmarks written yet.
Merge branch 'master' into interpolation-implementations
Added benchmarks for all interpolations. Only significantly slow one is Lanczos interpolation, which was expected, optimized it quite a lot. Could need another pair of eyes on it though.
Fixed final few things for the interpolation implementations. Should now be done.
Merge pull request #915 from johanstenberg92/interpolation-implementations

Interpolation implementations