make sure adb uses aapt from appropriate location
add a bunch of logging for better debugging of android startup issues
even more logging
make sure app is present and fail nicely if it's not (android)
another android python example
doh forgot to bind
update submodules including selendroid
make sure not finding the app apk is a capital offense (and tested)
update apidemos again
add contacts android app and example test
Catch null

Fix #504
Merge pull request #505 from bootstraponline/catch_null

Catch null
update readme
updated appium.io
add troubleshooting docs and migrate finding-elements wiki page to doc
update README to point to the new docs
get some errors from troubleshooting wiki into troubleshooting doc
table fix
better formatting
move other wiki files to codebase/docs