[Feature Request] Add common error explanations

[bransoned]

Is your feature request related to a problem? Please describe.
MemorEasy script has a lot of different exception handling and error print-outs. Would be nice to have a document that tracks and explains the common and non-important ones... eventually having explanation for every exception would be nice.

Describe the solution you'd like
Have a file in the repo or a docs page in the wiki (would need to setup) that explains common errors... eventually all errors. Some common errors include:

• Server errors (we just retry on these, almost always works the second time)
• "File already exists" errors (memories_history.html file sometimes contains duplicate memories sometimes for whatever reason)