Hi @tlycken ! Thanks so much for your effort here! I'm currently working on this myself on my local branch as well. The skeleton is almost identical. The hardest part of this feature is actually to implement and support the query syntax correctly as specified at https://docs.microsoft.com/en-us/rest/api/storageservices/querying-tables-and-entities.
Note that QueryTables also needs to support calls like https://myaccount.table.core.windows.net/Tables?$filter=TableName%20ge%20'prefix' and TableName%20le%20'prefix'. Also the $top operator needs to be supported. Last but least, for QueryEntities the filter expressions can be way more complex.

If this is something you want to do and are willing to commit to finish until end of next week, go for it! If that's not possible I will merge the last two commits from this PR since they contain two bugfixes I wasn't aware of :-) Also, the clean task will be merged, this is really great! Thanks!

@arafato I'm not sure how long it would take me to build a complete implementation, so I can't commit to doing it this week. Feel free to pick whatever parts you need from this PR (one key reason I made sure to separate the skeleton code from the other small improvements was to make sure you could pick whatever you wanted from it) :)