Fix install command

Appium needs 4.2. The default install will attempt to install all versions.
Added support for element based swiping.
make sure window handles are strings
add tests for stringiness of window handles
Merge pull request #394 from mutualmobile/element_based_swipe

Added support for element based swiping.
make this test less likely to fail
add an example of using appium with sauce and sauce connect (fixes #221)
Merge pull request #397 from jlipps/master

add sauce connect example
C#.NET now uses NuGet
Merge pull request #399 from penguinho/master

.Net now uses NuGet
make sure /sessions doesn't return false hard-coded information
Fixes #400
Merge pull request #401 from jlipps/master

better /sessions
Updated and fixed support for flick using touch actions.
add android loc strat sanity test
Merge pull request #402 from mutualmobile/android_flick_fixes

Updated and fixed support for flick using touch actions.
make sure empty selector doesn't crash appium (fixes #300)
Merge pull request #403 from jlipps/master

fix empty selector crash
go easier on these swipes to make them less flakey
fixes #330
Merge pull request #404 from jlipps/master

de-flakify
no need to short ourselves on horizontal space