GitLab

`calc-limited-simplification-mode'.
(calc-alg-simplification-mode): New function.

calc.el (calc-set-mode-line): Adjust mode line display
for basic simplification mode.

calc-help.el (calc-m-prefix-help): Update help message.

calc-ext.el (calc-init-extensions): Add bindings and autoloads 
for `calc-basic-simplify-mode' and `calc-alg-simplify-mode'.