Parth Chadha

Results 2 issues of Parth Chadha

When using chains such as Summarization chain (`load_summarize_chain`), the verbose flag wasn't propagated to the `LLMChain`.

1. Allow HuggingFace pipeline to use local GPUs if available. 2. If `transformers` is installed but `torch` is not, the existing `ImportError` still insisted that `transformers` is not installed.