Limit requests to server.

Squashed commit of the following:

commit 5c37e236337ac156aee07f4de5b1bb710f84234e
Merge: 47cfb63 0add8f0
Author: jstaffans <johannes.staffans@gmail.com>
Date:   Sat Nov 8 22:08:02 2014 +0100

    Merge branch '20141105_limit_requests_to_server' of git://github.com/rfay/wsandroid into rfay-20141105_limit_requests_to_server

    Conflicts:
    	res/values/strings.xml
    	src/fi/bitrite/android/ws/activity/Maps2Activity.java

commit 0add8f05468f1057f28e96265d8ab5d3a6ecc2af
Author: Randy Fay <randy@randyfay.com>
Date:   Wed Nov 5 12:25:00 2014 -0700

    Limit requsts to server when zoomed out too far