Merge pull request #32 from studyplus/3.0.0

3.0.0

fix IPHONEOS_DEPLOYMENT_TARGET

Merge pull request #18 from studyplus/stop_support_ios8

Stop support ios8

fix version

Merge pull request #17 from studyplus/log_sdk_version

show sdk version

Merge pull request #14 from studyplus/change_appstore_url

StudyplusのAppStoreのURLを変更

Merge pull request #8 from studyplus/add_change_key_and_secret

Consumer Key と Consumer Secret を動的に変更できるようにする

Merge pull request #10 from studyplus/build_xcode10

Build xcode10

Merge pull request #6 from studyplus/build_xcode93

Build Xcode9.4.1