ccre-v2.9.0: Release of CCRE with API 2.9.0.

WARNING: This release has not been tested on the cRIO due to a lack of a cRIO robot to test on. If you need cRIO functionality and don't have time to debug, refrain from upgrading.

Major changes:

* Added ControlBinding module.
* Added Mecanum implementation to DriverImpls.
* Added access to Joysticks 5 & 6 on the roboRIO. This still doesn't work on the cRIO even if a new DS is used.
* Added logging pane to emulator.

Minor changes:

* Added onInitComplete event to Igneous.
* Added addAllIfNotFound() to ConcurrentDispatchArray.
* Added asOutput()/asInput() to EventStatus and FloatStatus to match BooleanStatus.
* Added null checks to FloatFilter.
* Added invalid-parameter checks to some FloatMixing methods.
* Added CArrayUtils.collectIterable.
* Added LogLevel.next().
* Added ability to change bounds for PoultryInspector FloatControlComponent.
* Added ability to control LoggingTargets and RemoteProcedures from the PoultryInspector.
* Changed StorageProvider to accept arbitrary names for storage segments.
* Improved networking diagnostics.
* Expanded EventOutputRecoverable subsystem to include more EventOutputs. (debounce)
* Renamed BooleanMixing.ignoredBooleanOutput to BooleanMixing.ignored.
* Deprecated BooleanMixing.ignoredBooleanOutput.
* Renamed FloatMixing.ignoredFloatOutput to FloatMixing.ignored.
* Deprecated FloatMixing.ignoredFloatOutput.
* Deprecated EventStatus.countConsumers.
* Upgraded to Cobertura 2.1.1.
* Added deactivated QuickDeploy implementation.
* Added --failfast option to testing harness.
* Added assertFloatsNear to testing harness.
* Added TextBoxComponent to emulator.
* Added ccre.log.Logger to default list of imports in RobotTemplate.
* Deprecated CCRE.jar dispatch launcher.
* Deprecated RLoad mechanism.
* Deprecated Tokenizer.
* Deprecated Utils.dynamicCast.
* Deprecated Utils.getGenericClass.

Bugfixes:

* Fixed rendering glitches of PoultryInspector FloatControlComponent.
* Stopped attempting the impossible task of binding to port 80 on Linux and Mac OS.
* Specified behavior of CallerInfo more accurately.
* Improved edge case handling of DefaultThrowablePrinter.
* Improved behavior of ThrowablePrinter in exceptional scenarios.
* Improved edge case handling of CHashMap.
* Fixed DefaultStorageSegment handling of null values.
* Fixed completely broken FloatMixing.onUpdate() implementation.
* Simplified one FloatMixing.select() implementation.
* Improved error handling in PauseTimer main loop.
* Updated javadoc for DriverImpls.
* Fixed race conditions in EventStatus, MultipleSourceBooleanController, FloatMixing.select(), and PauseTimer.
* Fixed emulator race conditions.
* Fixed issue in check-header.sh caused by cRIO build.
* Clarified FloatMixing semantics on edge cases.
* Clarified *Input semantics on edge cases.
* Removed premature optimization of *Status objects.
* Clarified RemoteProcedure documentation.
* Slightly clarified licensing.
* Fixed miscellaneous typos.

New & improved tests:

* Added TestFilters.
* Added TestFloatMixing.
* Added TestWorkarounds.
* Added TestLineCollectorOutputStream.
* Added TestUniqueIds.
* Improved TestBooleanMixing.
* Improved TestPauseTimer.
* Expanded TestBooleanStatus.
* Expanded TestFloatStatus.
* Expanded TestMixing.
* Improved and expanded TestEventMixing.
* Improved and expanded TestEventStatus.
* Rewrote and expanded TestUtils.
* Rewrote, expanded, and improved TestCHashMap