v0.10.0

• Added loop.index0, loop.revindex, loop.revindex0, and loop.cycle gh-48
• Added init config extensions for 3rd party extension access in custom tags gh-44
• Added Whitespace Control gh-46
• Changed The empty tag in for loops is now else gh-49
• Changed forloop vars to loop closes gh-47
• Fixed include tag's with and only args documentation gh-50