GitLab

add not, and, or operators
add greater, less, greater_equal, less_equal, equal

Implement and Add tuple values to the runtime system.

implement and add cons to the runtime environment.

org_cherry_apply can handle variable parameter lists now.
Fix many corresponding bugs.

Move several runtime concepts (symbol mapping, exceptions, runtime
initialization) into its own file.

Add systemcall exit to the runtime environment.

org_cherry_eval uses now tailcalls for evaluating recursive processes.
Distinct between let and define for constant and value definition.

Move and rename some core- and system functions for the toplevel
environment.

Fix list generation from org_cherry_eval_values for avoiding
a list reverse at the end of this operation.

Add arithemtic function +,-,/,* to the toplevel runtime environment
Add proper exception handling.
Signed-off-by: Chris Mueller <ruunsmail@gmail.com>