v2.2.4

• Fixed major bug with limited amount of reactants/products in Balancing Reactions - Issue #45
• Fixed bug with Empirical Formula generation - Issue #41
• Removed rounding altogether to avoid inaccurate calculations - Issue #34
• Cleaned data types and null values from Periodic Table CSV - PR #44
• Added reduction potentials for halogenes F, Cl, Br and I - PR #23
• Overloaded the == operator for the Compound class, allowing for easy checking of equality between compounds