UPDATE:

 - INTEGRATE: added a new interface to d_quadpack in a separate module. todo: add
a better interface using interpolating function.

 - added a script *create_portable.sh* which create a portable version of the scifor library with
an editable makefile. script needs a path to directory as only argument. A makefile entry
is created which run the script for a default directory DIR=./scifor_portable. To use it
$make portable [DIR=<your directory>]

 - PARSE_INPUT now use a linked lists and support comments for better use.

 - minor updated to CONSTANTS, ARRAYS, OPTIMIZE