Add a bunch of stuff.

 -  Tags target now greps the include statements in the src files for
   libc includes and then tags those as well.

   + @cg505, you may want to check this out, I think it's pretty cool.

 -  Regular expression parsing added, example in src/main.c as of now,
   so-far seems to work great. @cg505 may want to check this out also.

   +  I will add more functions to, for example, get all of the matches in
     an array or linked-list, so the hacker can know what matches their
     regular expression, and, perhaps, do further checks against that.

 Signed-off-by: Kristofer Rye <kristofer.rye@gmail.com>