readme: text links
readme: added link to guide for setup with custom configuration instead of a separate target
KNOWN_PRIVACY_SETTINGS const cannot be doc'd private

it is referenced in public docs
class attr @@launcher should be private

yard does not doc class attrs well.
added docs about @@launcher to class doc
Merge pull request #439 from calabash/feature/touch-up-launcher-docs

touching up the launcher docs
Merge pull request #419 from fabb/calabash_build_config

Readme: Link to Guide for Setup with Custom Build Configuration
show the badges?
Merge pull request #441 from staxmanade/patch-1

show the badges?
changelog should be up-to date
Merge pull request #442 from calabash/feature/update-changelog

changelog should be up-to date
dev related file in test/cucumber should be gitignored
should detect simulator sdk from DEVICE_TARGET
if DEVICE_TARGET is set for sim, we should use it
added missing vis private doc tag
launcher needs public interface for resetting sim content & settings
should use reset_app_sandbox and deprecate reset_app_jail

Ugh. This is a big change set.  I had to close the original,
incremental, PR.  Apologies.
removes and empty launcher spec
launcher spec needs a more realistic env to test against
new test app to demonstrate reset features