a trivial commit
move RectangleProjectFactory to project package
in MFAnalysisModel, take MFSubdomainType as the key to fetch corresponding subdomains
remove redundant get diff orders methods of Assembler
remove redundent generic parameters
rename zeros to ZEROS
extract LinearItegratePointsFactory and use Segment2DQuadrature
remove unfunctioned
trivial commit
add synchronizable and Serializable feature of MFLoad
remove Runnable requirement of MFIntegrator
make log more laconic
split integrators and their cores by MFProcessType
add add() to MFMatrix and add DenseMatrix64F specific wrapper
improve wrappers
split assember and integrater by MFProcessType

  * make a more flat structure of integrate and assembler
  * rewrite all the tests of assembler