This adds a wrapper over EJML's SimpleMatrix that uses generated classes representing numbers to encode the dimensions of each matrix at compile time, and to check operations between matrices for validity at compile time, rather than failing with an exception at runtime. This is required for the Java implementation of state-space control.
Additions to the wpiutil gradle script, and a python script at the wpiutil root are used to generate numeric types from a template at build time for both gradle and cmake. Users will be able to access types through functions on the Nat class.
This fixes two real bugs:
- TimedRobot had a m_period that was hiding the IterativeRobotBase m_period
and was not getting initialized.
- PDPSim was swapping two parameters to getCurrent()
A hash is stored for each native library with the name libraryName.hash.
If the library is not found on the system search path, it is extracted to a cache directory.
Extracted libraries are named with the hash appended, so the library will not be
re-extracted if one with the same hash already exists.
Hashing without the hash file requires double traversing if the file is not in the cache,
but it is still faster than creating a new file in most cases. This won't be needed
after opencv is updated to provide a hash as well.
