Fixed some battle issue + Test With squirtle.

While testing with a new pokemon i noticed that logic had some issue.
The pokemon was gaining Hp instead of loosingg HP. I quickly fixed it
with the addition of a Math.Abs.
Created a new pokemon called Squirtle he's cool. I added it to Anna's
team. I ran the earlier test with it.
More than 1 pokemon.

Anna has now 2 pokmemon in her team. Pkachu and Squirtle, when one
faints she send the next one to the field. Right now the way of calling
the second pokemon is fixed. With a bit more time and some playing
around its possible to get it so that the new pokemon is called
randomly from the list.
Updated battle flow

Ok! now the battle flow is also updated when we switch pokemon. The
variable names need some fixing but yeah its done.