container.pl: can now generate constructors for an arbitary number

container.pl: can now generate constructors for an arbitary number
    of arguments
function.pl: new concept for specifying options for functions,
    take a look at the function_options class
    first experimental support for remembering functions
    IMPORTANT: the syntax of the macro REGISTER_FUNCTION() has
    changed incompatibly (see inifcns.cpp for an example)
flags.h: flags for remembering strategies (lru, lfu,...)
inifcns*.cpp: use the new REGISTER_FUNCTION() macro syntax
numeric.h/cpp: hashing for numbers using CLN's cl_equal_hashcode()
    seems to give increased performance
simp_lor.h: simplify_simp_lor can be called without scalar products list
structure.pl: bug fix in regular expression
normal.cpp: bug fix, a_numeric.compare(_ex0)