* [pipeline] Allow for batch indexing when using Pipelines fix#1168
* [pipeline] Test case fixed fix#1168
* [file_converter] Path.suffix updated #1168
* [file_converter] meta can be one of these three cases:
A single dict that is applied to all files
One dict for each file being converted
None #1168
* [file_converter] mypy error fixed.
* [file_converter] mypy error fixed.
* [rest_api] batch file upload introduced in indexing API.
* [test_case] Test_api file upload parameter name updated.
* [ui] Streamlit file upload parameter updated.
* first running version of eval mode
* restructuring, new naming of elements and testing
* add new files to Docker, how to start with Haystack reference, remove not needed dependencies
* Add latest docstring and tutorial changes
* merged changes
* fixing bugs after breaking changes from last release
* newser version of states in streamlit, more docs for eval mode, eval file as env virable
* eval file as env variable
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