(expand.prc) safer check for function names
(init.prc) avoid crash when init is called more than once, instead ignore repeated calls
(expfunction.prc) removed unused variable
added code to compute integer partitions
added expansion of Gamma functions
(partition.frm) fixed algorithm for generating partitions
cosmetic changes: deleted whitespace and dead code
renamed expansion procedures for functions
(expand.prc) made lookup a bit more compact
(expand.prc) added case for expanding Gamma functions
added support for proper local series variables
use new local series variables in three-argument versions of the expansion procedures
(series_tst.frm) added test case for local series variables
added helper procedure to determine the coefficients inside function arguments
use new procedure to determine series coefficients
added code for expanding the Gamma function with an expression as argument