Added support for locking the IOS device for a number of seconds.

Removed unused code
Merge pull request #795 from mutualmobile/ios_lock

Added support for locking the IOS device for a number of seconds.
Added support for backgrounding the IOS application for a # of secs
Merge pull request #794 from mutualmobile/ios_background

Added support for backgrounding the IOS application for a # of secs
look for ~/.profile in sysExec()
add troubleshooting note for MacPorts
Merge pull request #800 from herzbube/macports-troubleshooting-notes

add troubleshooting note for MacPorts
Merge pull request #799 from herzbube/use-profile-in-sysexec

look for ~/.profile in sysExec()
jarsigner
Merge pull request #807 from bootstraponline/jarsigner

jarsigner
Update style-guide.md
Update style-guide.md
Update style-guide.md
Update style-guide.md
fix style guide layout
Enable keystore on Selendroid