nuget: Add scripts for publish and setting API key
nuget: Include source code for symbols package
Added Frequency units
Fixed incorrect use of tabs.
Merge pull request #39 from bretthysuik/feature/Frequency

Feature: Frequency units
frequency: Fix missing curly brace
Implemented a custom ToString formatter for units

- Values below 1e-4 are always displayed in scientific notation.
- Values between 1e-4 and 1 are in fixed point notation.
- Values between 1 and 1e5 are in fixed point notation.
- Values above 1e5 are in scientific notation.
- Users can choose the number of digits to display after the radix point.
- Fixed #38
Removed tabs
Added electric current units
Added electric resistance units
Added more prefixes for electric potential

- Millivolts and kilovolts are very commonly used. Microvolts are less common but still
	useful in certain situations.
Merge pull request #41 from bretthysuik/feature/electric-resistance

Feature: Electric resistance
Added megavolts
Added nano, micro, kilo, and mega ampere prefixes.
Fixed broken unit tests.
Added power units
Changed power base units type to decimal.
Added support for generating logarithmic units

- "Logarithmic" and "LogarithmicScalingFactor" are used in the json file to indicate the unit is logarithmic.
- Added a separate PowerShell script to generate the logarithmic arithmetic operator source code.
Added support for generating arithmetic operator unit tests for logarithmic units
Tweaks to logarithm PowerShell scripts

- Added documentation to logarithmic source code generator functions.
- Tweaked various comments and names.
- Inverted logic when checking if a unit is logarithmic so it's easier to read/understand.