* added new transaction types: AIRDROP, HARDFORK, INTEREST, MINING, STAKING, WAGES. Removed transaction type EARN, which used to encompass all the above types
* revisited output generators: rp2_report was renamed to rp2_full_report and mock_8949_us was renamed to tax_report_us. The tax_report_us plugin now generates one sheet per taxable event type: Airdrops, Capital Gains, Donations, Gifts, Hard Forks, Interest, Investment Expense, Mining, Staking, Wages.
* fixed bug in from/to_year logic: entry sets didn't consider the time filter in certain corner cases
* updated documentation to reflect above changes