osmand specific intents

Addition of 2 schemes for osmand specific intents
- osmand.navigation: same behaviour as google.navigation: e.g. osmand.navigation:q=51.00,3.00
- osmand.geo:  same behaviour as geo: e.g. osmand.geo:47.6,-122.3?z=11 or osmand.geo:0,0?q=34.99,-106.61(Treasure)