activity buttons color changed programiclly, hopfully there will be no
more transparent background (trzeba podesłać Andrzejowi bo on tak miał
za każdym razem)
gps arrow in activity view. Map center is not being stoped after movig
map yet.
map following stoped after user touch map or zoom map. he can start
following by pressing button or it starts following itself after 5s of
inactivity. map centering button hides when its not needed (when map is
already beeing tracked)
fixed bug I made with drawing line in history.
km text on markers
fixed bug with white color under list footer
Merge pull request #85 from jskudlarski/master

map center button + activity buttons color controlled in java