v0.1.0

• First release.
• Got "calc what" radio buttons working again (using Immutable-JS), closes #1.
• Made the imageSrc path variable within each calculator relative to the calculator, closes #3.
• Added expanding functionality to the calculator intros and hided them by default, closes #6.
• Stopped calculators re-rendering unless they have to (fixed serious performance issues), closes #5.
• Centered the calculator tables in the middle of their tabs, closes #11.
• Centered the text in the calculator table for the variable name and symbol, closes #10.
• Added the ability to specify the size of a calculator (e.g. small, medium, large), closes #8.
• Added rounding to calculator outputs, closes #12.
• Multiple instances of the same calculator type are now allowed to be open, closes #15.
• Clicking 'Open' on a calculator in the grid view now opens it's tab, closes #14.