typo in help("rearrange")
doc update: completed sentence in help("list_sort");
disabled 4 functions from slang.h which are currently not defined by the library
`make runtests` collects exit status of all tests
typedef'ed unsigned long to SLhash_Type in _slang.h
slassoc.c: delete_assoc_array can now safely handle NULL
+ removed redundant variable assignment
extended C API for dealing with SLang_Assoc_Array_Type & SLang_List_Type:

SLang_Assoc_Array_Type *SLang_create_assoc (SLtype, VOID_STAR);
int SLang_assoc_put (SLang_Assoc_Array_Type *, SLstr_Type *, SLtype, VOID_STAR);
int SLang_assoc_get (SLang_Assoc_Array_Type *, SLstr_Type *, SLtype *, VOID_STAR *);
int SLang_push_assoc (SLang_Assoc_Array_Type *, int);
int SLang_pop_assoc (SLang_Assoc_Array_Type **);
void SLang_free_assoc (SLang_Assoc_Array_Type *);

SLang_List_Type *SLang_create_list ();
int SLang_list_append (SLang_List_Type *, SLtype, VOID_STAR, int);
int SLang_list_insert (SLang_List_Type *, SLtype, VOID_STAR, int);
int SLang_push_list (SLang_List_Type *, int);
int SLang_pop_list (SLang_List_Type **);
void SLang_free_list (SLang_List_Type *);

VOID_STAR SLang_alloc_anytype ();
C API tests for the new SLang_Assoc_Array_Type & SLang_List_Type functions
_debug_info is an obsolete_int_variable
unified module tests, which are now also executed by `make runtests`
added json module
simplified Makefile for modules using macros
`make clean` forwards to src/test; `make distclean` removes config.h and terminfo.inc
+ corresponding .gitignore file
json-module supports binary strings (as values, however not as keys)
typo in doc/crtl/slinterp:SLang_byte_compile_file
json-module: true & false are represented by '\1' & '\0' (UChar_Type)
json-module: documentation added
Changed slassoc.c to use explicit ref counting instead of MMTs.
`make clean` forwards to src/test -- a ';' was missing before
json-module uses LLong_Type (if available) for integers