use AlarmManager and PendingIntent for location service, fix #49

update gradle plugin to latest AS version

moved locationlistener to a service, ref #49

update weatherHandler after activity recreation

fix possible NPE

replace tablelayout with linearlayout in drawer item layouts, ref #47

don't show group indicators, ref #47

replace views in nav drawer with single ExpandableListView, ref #47

use new bubble layout for pois from osm, ref #32

define app color values, fix #48

also add WilliamChart to strings (about activity)

add WilliamChart to authors (libs)

add biota to add poi menu, ref #14

small bubble overlay UI adjustments

hike display improvements and only display hikes around current location, ref #12

small bubble UI adjustments

only display edit button if marker is poi, ref #32

fix times

use own bubble layout for popups [1/?], ref #32

remove debug logging

switch between °C and °F in current weather display, ref #43

switch between °C and °F in settings, ref #43

add (dummy) option to switch temperature units and use unicodes instead of °F/°C

add toast info to elevation profile data points

don't convert to ms

fix typo

don't use hardcoded column index

add option to discard hike record

animation is in ms not s <.<

show osm attribution in hike detail view and margin adjustments