v0.11.2

ZigZagBoomerang v0.11.2

Diff since v0.11.1

Merged pull requests:

• Better explanation of derivatives (#101) (@mschauer)
• Add Tilde and Soss version of the logistic regression example (#102) (@mschauer)
• Tweaking Turing example (#103) (@mschauer)
• Add a test for mass matrix (#104) (@mschauer)
• Add iterator for tilde (#105) (@mschauer)