Added big.js
Added a function to convert infix math expressions to their RPN equivalent. Added a function that calculates a value from an RPN expression.
Fixing test
Structuring calculation functions into a Calculator model
Adding a stack and buffer concept to Calculator to keep track of operators
Figuring out calculator domain
Calculator treats last result as first operand if first operand omitted.
Fixing issues with the displayed value during certain operations
Fixing more display issues
Setting up a calculator demo
Connected view plugin to calculator model
Test view syncing
Buffer operator can now be correctly shown as blank
Implement clear button and test view buttons
Added plus/minus button for negating the current value