Add menu entry for launching SettingsActivity form WelcomeActivity

	modified:   src/main/java/net/jarosinski/ned/activities/WelcomeActivity.java
	modified:   src/main/res/menu/welcome.xml
Get API base URL from settings on each request, not only on class instantiation

	modified:   src/main/java/net/jarosinski/ned/net/WebUtils.java