Release v1.0.4

Changes

• 847d9bc Do not fetch unshallow
• 7a22251 Set fetch depth to 0
• 8208e3e Prepare for release
• 89661a3 Use conversion_current inststead of conversion_rate and currency
• 1e783ca Move calculated change/totalchange lists to const.py
• 533ce05 Add update help functions
• 39492d2 Convert amount per share for dividends
• 7a61598 Add ability to set conversion rate and currency
• 18d31b7 Fix spelling
• 8d4acec Add purchase_price as optional configuration