Timer didn't have working move semantics because mutexes aren't
moveable, meaning the default implementations were ill-formed.
MotorSafety wasn't locking its mutex.
The old headers were moved into folders because doing so avoids polluting
the system include directories.
Folder names were also normalized to lowercase.
* GetClock() is now officially deprecated since its comment already informally
did so and the function just forwards to Timer::GetFPGATimestamp().
* The declaration of GetPPCTimestamp() is missing a definition and has been
removed.
* std::this_thread::sleep_for() returns immediately when given a negative
duration, so the check for that was removed from Wait().
* Removed hal::priority_condition_variable
* Replaced uses of priority mutexes with std::mutex and std::recursive_mutex
This allowed replacing a use of std::condition_variable_any with
std::condition_variable.
* Replaced all uses of std::recursive_mutex with std::mutex equivalents
* Revert "Force OpenCV to 3.1.0 (#602)"
This reverts commit 50ed55e8e2.
* Removes Simulation
* Removes old build system
* Removes old gtest
* Adds new gmock and gtest
* Updates to new ni-libraries
* removes MyRobot (to be replaced)
* moves files to new location
* Adds new sim backend and new test executables
* updates .styleguide and .gitignore
* Changes cpp WPILibVersion to a function
MSVC throws an AV with the old version.
* Disables USBCamera on all systems except for linux
* 2018 NI Libraries
* New build system
