Remove gh-pages docs, add nightly ci testing
Created by: alexheretic
With doc.rs hosting rusttype docs, we can remove the gh-pages generation for docs. This pr also adds nightly CI, with bench code compilation testing.
running 5 tests
test gpu_cache::need_to_check_whole_cache ... ok
test geometry::quadratic_test ... ok
test gpu_cache::cache_test ... ok
test gpu_cache::cache_bench_tests::cache_bench_tolerance_1 ... ok
test gpu_cache::cache_bench_tests::cache_bench_tolerance_p1 ... ok
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out