Merge pull request #224 from ishkawa/release/3.1.2

Release 3.1.2

Merge pull request #219 from ishkawa/release/3.1.1

Release 3.1.1

Merge pull request #216 from ishkawa/release/3.1.0

Update version to 3.1.0

Merge pull request #211 from ishkawa/release/3.0.0

Release 3.0.0

Merge pull request #208 from ishkawa/update-podspec-beta-2

Update podspec for 3.0.0-beta.2

Merge pull request #194 from ishkawa/si-swift3

Swift 3 support

Set version 2.0.5

Set version 2.0.4

Set version 2.0.3

Merge pull request #182 from ishkawa/release/2.0.2

2.0.2 release