Add function match_times and match_full

[Amiralgaby]

I propose to add two of my functions created to learn how to make pull requests, they seem interesting to me to have new features.
I'm beginner in GitHub pull request and I'm only second degree bachelor :)

match_times

This function gives the number of occurrence of pattern in text.
It takes an function executed when a match is found and take two parameters : index of start of current match and its width.

match_full

This function return 1 (true) if the pattern match perfectly with text (match isn't a sub-string)
0 otherwise

I would like to know what you think of my idea.

have a nice day :)