Merge tag 'stevedore-0.8.0-beta.2' into develop

stevedore-0.8.0-beta.2
Updated version for next release cycle
Remove old release scripts
Link reference page in readme
Add optional keyword arguments to deref

The keyword arguments allow support of bashes parameter substitution modifiers,
-, :-, =, :=, +, :+, ?, :?.
Simplify src line comment handling
Allow for unnamed functions in exception message
Updated project.clj, release notes and readme for 0.8.0-beta.3
Merge branch 'release/0.8.0-beta.3'