calendar addon: recognize one more variation of the event time
Fix #3458, send2cgeo for opencaching.nl
fix #3457: crash when using Google Maps on a Jolla
refactoring: eclipse 4.4 has stronger null checks
extremcaching connector initial version
extremcaching connector license text
extremcaching connector added logging capabillity
implemented suggestions from review
integrate extremcaching.com

* cherry-pick existing commits and have some basic tests
* disable EC connector by default
* fix faked geocodes during GPX import
* parse wrongly encoded container size
fix 3461: CME in map filtering
fix: NPE in search by geocode
fix: recognize waypoints in EC GPX files
refactoring: remove duplicated preferences
rename Login to GCLogin

* easier to differentiate, as there are other login providers now
refactoring: remove duplication in login classes

* convert from static to singletons
cleanup: fix all findbugs on test and calendar
fix outdated Javadoc
refactoring: remove duplication in logging manager
new: have OpenCaching.com as normal connector

* now with bounding box search for live map
* fixed search by center
* added setting to enable/disable connector
refactoring: remove code duplication