Bumped version to 2.8.0

Bumped to 2.7.2

Bumped version to 2.7.1

Bumped version to 2.7.0

Bumped podspec to 2.6.0

Bumped version to 2.5.1

Merge pull request mikaoj#99 from mikaoj/swift3

Swift3

Merge branch 'florentmorin-master'

Merge pull request mikaoj#76 from mikaoj/hotfix/carthage_ios8

Added platform target to Podfile