Daniel Sommer

return warnings instead of exceptions & accept file handle

1

- Allow samplesheet to accept a file handle or a Path like object - [replace exceptions with warnings](https://github.com/clintval/sample-sheet/commit/989298cfdabba60d4abea3e0c9ba41c4f260338f)

Running the test suite on the master branch fails on MacOS. I am running MacOS Monterey 12.2.1 on a INTEL mac with python 3.7. pytest Error: ``` E AssertionError: 'BARC[68...

If the file passed to the SampleSheet constructor contains data but no sections the error produced is: ``` 'SampleSheet' object has no attribute '' ``` Should output an invalid formatted...