Updated TODO

I didn't like the existing capturing group implementation, so I moved
that to a separate branch. This branch does not (at the moment) any code
relating to capturing groups.

todo.txt

@@ -1,3 +1,10 @@
 1. Error-checking - invalid regex, Out-of-bounds stuff. Do more testing.
 2. More operators - numeric specifier, escaped characters
 3. Fix adding concatenation operators in shunting-yard function (very janky, compares against operators individually)
+Ideas for flags:
+    -o, -v : Only matched text (separated by newline), Inverted match (just like grep)
+        Also some other grep flags (will have to look into this)
+    NOT IN GREP
+    -s : Substitute (string is provided as argument)
+    -p : Print CSV (or some format) of matches - start idx and end idx
+    -m <num> : Print <num>th match (-m 1 = first match, -m 2 = second match)