Update clang workflow

Merge pull request #7 from KredeGC/reference-allocator

Reference allocator

Merge pull request #5 from KredeGC/dev

Dev

Move ALIGNMENT to detail namespace

Add more doc comments to allocators

Update README

Update premake file to be able to use different cpp dialects

Move helper functions into ktl::detail namespace

Use template struct for closest-power-of-2 in segragator_fwd

Update interfaces and examples in README

Update README

Fix find and erase in unordered_multimap

The key_iterator no longer stores the key and counter

Update README

Add constness to various methods in unordered_probe_map