Can't parse chat files with LF endings

[staveyal]

Issue:

When uploading a file with LF line endings (\n), the code fails to parse the files correctly, and removes a character from the end of each meassage.

Cause:

In server/server/parsing/utils.py, we removed a single character from the end of the line (to compensate for Windows line endings).

def create_chat_def(chat_file):
# ...
chat_df['message'] = chat_df['message'].str[:-1].astype(str)  # remove end of line (could be "/n" or "/t")
#...

Suggested solution

We should implement a fix that detects if the file uses CRLF or LF line endings, and splits by the corresponding character.

[jonohayon]

Fixed in #66, still awaiting review by @InbarShirizly