Add more algorithms

[maxharlow]

• Jaro-Winkler
• Q-gram

Sources:

• http://www.cs.cmu.edu/~wcohen/postscript/ijcai-ws-2003.pdf
• https://github.com/JohnnyBravo75/TwinFinder
• http://yomguithereal.github.io/talisman/metrics/distance

[maxharlow]

Duplicate of #8