Add ARGS_STRING_POINTER_LENGTH option. It allows to display
pointer value and string length for "char *" arguments.

Added SYM_NOEXIT option to be able to run only pltentry
callback for specified symbols.

This option is needed for setjmp symbol, otherwise the
tracee segfaults. The "_setjmp" symbol is added as default
value to the global config file.

Added following config file options:

LIBS, LIBS_TO, LIBS_FROM, SYM, SYM_OMIT, SYM_BELOW

They match their command line equivalents.

As per David Gilbert's email:
On library functions like strcpy() where there is a destination
string, latrace -A ends up trying to print out the
destination buffer which may be completely invalid.

Maybe it's worth doing the same trick that ltrace does, and just
declare the destination parameters as void*

until we handle bad characters somehow, replacing
destination char pointers with void pointers

- added OUTPUT_TTY config file option
  it is possible to catch traced program tty output and
  storing it to the configured file (0/1/2 descriptors
  are monitored)
- added automated test for the option
- refactoring process method a bit
- disabling connection between -R and -q options