linked list source, add macros, add create function
add basic linked list functions
add linked list initialize and finalize function
add test file, fix linked_list with "free dummy nodes first and last"
realy add test
added function pointer to free and compare data node, data search function node
simple data structure-linked_list-1v
add example
Merge branch 'master' of github.com:RGCR/data_structure_rc
add example1 to makefile