RootFinding: drop 'and' in functions; migrate exception text to resx.
RootFinding: quadratic case, inline docs
LA: minor optimization
GammaRegularized: Tests to confirm bug on large arguments
GammaRegularized: fix for large argument bug
GammaRegularized: minor code cleanup
Build: fix portable build directives in FindRoots
RootFinding: minor linear algebra and naming tweaks in Broyden method
Fit: multidim/vector version of linear combination fitting
Fit: rework multidim/vector linear combination fitting
Fit: add 'Linear' prefix to multidim and vector for clarity
Fit: rework multi-dimensional fitting
Update release notes and contributing
Fit: linear generic fitting (generic x values)
Update text file links in solution (release notes etc)
Simplify root files slightly
Distributions: ctor overloads that accept Random argument
Distributions: formatting cleanup (no code changes)