display radial overlay at biota marker position

minor bubble UI improvement

update gradle to AS 2 release

show endangered species on biota marker click, ref #14

add biota and endangered classes and db tables

minor bubble UI improvement

another gradle plugin update

add license

biota dialog UI improvements and possibility to add images to entries, ref #14

add basic "add biota" dialog, ref #14

close infoWindow if another one is opened, ref #32

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