add process arguments for ios specific e.g usage
        capability[:processArguments] = "forceLogout"
Merge pull request #2040 from jlipps/master

don't ever use sudo to reinstall npm modules
Merge pull request #2039 from deivanai/master

add process arguments before spawning instruments
Making sure cwd is appium install dir
Update troubleshooting.md
Merge pull request #2043 from sebv/cwd

Making sure cwd is consistent
Merge pull request #2046 from Javier84/patch-1

Update troubleshooting.md
Default to mercy on iOS
Merge pull request #2048 from bootstraponline/ios_mercy

Default to mercy on iOS
point out that locationServicesEnabled cap requires bundleId
ensure we get a decent error message if someone uses locationServicesAuthorized with no bundleId