Adding the beginnings of new Equations interface
Initial sketch of a basic version Equation complete
- support of basic operators passes all major unit tests
- support for parentheses
- Added support for double variables
- Added support for functions with single input and output
- added gradle build system
- moved source code around
- Tweaks to build process
- fixed a bug in SimpleMatrix
- IntelliJ configuration files
- First draft of Equation appears to be working
  * Created Kalman filter example
- Changed symbols from character into enum
- Added support for element-wise ops with .* and ./ notation
- Added comments to code
- Equation
 * fixed element-wise issues
 * Added support for exponential format floats
- SimpleMatrix
 * Added elementDiv
- Equation
 * fixed parentheses issue
 * Added support for functions with multiple inputs
 * crude incomplete sketch for smarter parser
- Equation
 * Added support for vertical and horizontal matrix concatenation
 * Made [ and ] reserved characters for future use
- Re-organized to improving the naming a bit of sub-projects
- fixed gradle script for install
- Added extract function and extract syntax to equation
- Minor improvements to small matrix operations
- Added bracket matrix constructor to equation
- Added assign to inner sub-matrix to equation
- Added special characters to submatrix extents
- Correctly handle minus symbol directly in front of a scalar number