code cleaning
simplification of IO interface
Eigen vector type moved to global header
DoubleFunction: more efficient call (less copies)
Various Eigen types brought into Latan scope
big update: first fit implementation
standard math: now uses lambda functions
DoubleFunction: safer variadic call with variadic template
code cleaning
DoubleModel: bind to a constant parameter set into a DoubleFunction
Plot: object to plot a DoubleFunction
update of standard math functions with C++11 additions
plot example update
XYStatData: simpler data access
more loop macros
DMatSample: block access
warning fix in new clang version
debug macros
StatArray: covariance estimators
PlaceHolder type is declared in Global.hpp