Update to v0.8.1

Bump version to 0.8.0, new compile flags for release.

Tidy up evaluation parameters and bump version to 0.7.5

Update LICENCE

Update README.md

Merge pull request #28 from konsolas/king-safety

Better evaluation

Merge pull request #26 from konsolas/king-safety

Search improvements and bugfixes

Merge pull request #24 from konsolas/eval

Separated pawn structure evaluation, along with some bugfixes

Merge pull request #22 from konsolas/eval

Evaluation simplifications + fixes to Syzygy tablebase code.

Merge pull request #20 from konsolas/refactor

Refactor search and add back Lazy SMP