Added missing import declarations#49

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ekscrypto wants to merge 10 commits intoaschuch:masterfrom

ekscrypto:master

Commits on Jun 17, 2017

Added missing import declarations
Dave Poirier
committed

Commits on Jun 19, 2017

Added a section to the readme.md about error correction, which is already implemented in the code, but was not otherwise mentioned in the docs.

ericwastaken
authored and
Dave Poirier
committed

Commits on Sep 19, 2017

Run in xCode9 GM seed and ios8, it will be crash.
7owen
committed
update podspec for 2.0.1
7owen
committed

Commits on Jun 28, 2018

Merge pull request #1 from 7owen/master
ekscrypto
authored
Updated Travis-CI to Xcode 9.4
Dave Poirier
committed
Swift 4.0 String .count
Dave Poirier
committed
Updated project build numbers
Dave Poirier
committed
Xcode 9.4 Swift 4.0
Dave Poirier
committed
Updated README for 2.0.1 release
Dave Poirier
committed