v0.8.3

General improvements

• updated to the latest version of readline. This, in particular, allows to build Joker for Solaris.
• new joker.core/joker-version function
• new joker.core/*joker-version* var
• new joker.json/write-string function
• new joker.time standard namespace, currently with only one function joker.time/sleep

Linter improvements

• fixed false positive on array call in ClojureScript (#18)
• warning on re-declaration of core vars

Fixes

• fixed str for string, regex and chars