Float equality

[rjbohinski]

Found in BreachDefenseAuto.java, in isFinished().

Testing for equality with floats is unreliable due to the nature of floats. See this article for more information.

This operation compares two floating point values for equality. Because floating point calculations may involve rounding, calculated float and double values may not be accurate. For values that must be precise, such as monetary values, consider using a fixed-precision type such as BigDecimal. For values that need not be precise, consider comparing for equality within some range, for example: if ( Math.abs(x - y) < .0000001 ). See the Java Language Specification, section 4.2.4.

[rjbohinski]

This issue is now also present in org.usfirst.frc.team2729.robot.subsystems.ShootingSystem.setTargetTilt(double).

public void setTargetTilt(double _target) {
    if (targetString != _target) {