* removed warning missing return, dangling else
* fixed errors, made sure to return false in all shape inference failures
* shape inference use LogicalResults as return value
* format fixed
* format error
* additional error correction
* handle errors properly for all former emitError site, using either emitError, assert, or llvm_unreachable
* help added
* fixes
* edit of doc
* doc edit
Alexandre Eichenberger