moved stack shit to it's folder
partially moved parse tree into files
removed a lot of stuff from main.c
included makefile in git tracking
moved construct_parse_tree() to parse_tree.c
added .gitignore (YAY!!!)
added function for removing whitespaces a little more clever
heavy refactoring on sanitizer
moved surrount_to_parentheses() to sanitizer
replaces special characters in sanitizer
parse_tree utils now contains only extract_parentheses() (will add more later)