Merge pull request #1 from sellibitze/master

added interval heap implementation and fixed immutslist test code
basic BList impl
tests, benches, and more for BList
add clear
cleanup blist impl, add append_lazy
cleanup to blist
Merge pull request #2 from Gankro/blist

Add BList
bump version number
Fix minor nits in the README.md
Merge pull request #5 from tbu-/pr_readme

Fix minor nits in the README.md