1. Changed the build script to support arm64 and x86_64.
2. Deployment target has been changed to 5.1.1 since it’s only supported in arm64 mode.
1. Compiled Tesseract for arm64 and x86_64. The later one is necessary to run in 64bit under simulator.
2. Removed traineddata and md files from compiled Framework. Let the users to choose the traneddata the wants.
Merge pull request #18 from ws233/master

arm64 ready