Enabled nuget package restore in UnitsNet.Tests.net35.csproj for NUnit dependency.
Implemented * == != operators in Force.cs
Implemented Equals and GetHashCode methods in Force.cs
Added unit tests in ForceTests.cs:
* ArithmeticOperators
* ComparisonAndEqualityOperators
* CompareToIsImplemented
* CompareToThrowsOnTypeMismatch
* CompareToThrowsOnNull
* EqualsIsImplemented
* EqualsReturnsFalseOnTypeMismatch
* EqualsReturnsFalseOnNull
Implemented missing * and / operator overloads in Force.cs.
Added unit tests for the new overloads in ForceTests.cs.
Added unit tests for negative equality and comparison cases in ForceTests.cs.
Added missing * operator overload in Length2d.cs.
Added unit tests in Length2d.cs:
* ArithmeticOperators
* EqualityOperators
* EqualsIsImplemented
* EqualsReturnsFalseOnTypeMismatch
* EqualsReturnsFalseOnNull
Separated out ComparisonAndEqualityOperators into ComparisonOperators and EqualityOperators in ForceTests.cs.
Added missing operator overloads for * and / in Length.cs.

Added unit tests in LengthTests.cs:
* ArithmeticOperators
* ComparisonOperators
* CompareToIsImplemented
* CompareToThrowsOnTypeMismatch
* CompareToThrowsOnNull
* EqualityOperators
* EqualsIsImplemented
* EqualsReturnsFalseOnTypeMismatch
* EqualsReturnsFalseOnNull
Moved DynamicConversion from LengthTests.cs and DynamicConversionThrowsOnIncompatibleUnits from UnitConversionTests.cs into new class UnitConverterTests.cs. Renamed test methods for clarity.
Added TODO note on missing tests in UnitConverterTests.cs.
Changed ElectricPotential, Torque and UnitValue from class type to struct type.
Minor refactoring of Equals methods in Length.cs
Changed Mass from class type to struct type.
Added Max, Min and Zero static properties to Mass.cs.
Added operator overloads for * and / in Mass.cs.
Added != and == operator overloads in Mass.cs.
Added Equals and GetHashCode methods in Mass.cs.
Added unit tests in MassTests.cs:
* ArithmeticOperators
* ComparisonOperators
* CompareToIsImplemented
* CompareToThrowsOnTypeMismatch
* CompareToThrowsOnNull
* EqualityOperators
* EqualsIsImplemented
* EqualsReturnsFalseOnTypeMismatch
* EqualsReturnsFalseOnNull
Pressure.cs:
Added Max, Min properties.
Added *, /, == and != operator overloads.
Added unit tests in PressureTests.cs:
* ArithmeticOperators
* ComparisonOperators
* CompareToIsImplemented
* CompareToThrowsOnTypeMismatch
* CompareToThrowsOnNull
* EqualityOperators
* EqualsIsImplemented
* EqualsReturnsFalseOnTypeMismatch
* EqualsReturnsFalseOnNull
Changed Length.Equals() method to compare against Meters instead Kilometers.
Added Equals and GetHashCode methods to Pressure.cs.