Add substring parsing
parser.c parses for multiple substrings within the pattern
makeURL() generates urlinfo structs. Use urltestmakefile for a test program.
makeURL() generates urlinfo structs. Use urltestmakefile for a test program.
slight fix to urltest.c
slight fix to urltest.c
crawler works, but only checks a few links
Add generic linked list and binary tree
Binary tree and linked list hold compare function in struct
Group urls by domain and update data structures
update changelog