Project modernization for Xcode 4.2 and OSX Lion

Performed code modernization
Solved some of the deprecated warnings (those on NSSavePanel)
Tweaked the main.xib of MacFUSION.app in order to better manage the column widths, so that the mount/edit buttons are no more partially hidden on launch
Solved deprecated use of launchedApplications

Edited code in MFSettingsController#setup and mfcKaboomMacfusion() to replace launchedApplications with runningApplications, which returns an NSArray of  NSRunningApplication instead of an NSArray of Dictionaries
Corrected typo (missing "!" on mfcKaboomMacfusion()
remove insecure ssh options

The current code runs ssh with CheckHostIP=no and StrictHostKeyChecking=no
on the command line. These are security-sensitive options which an
application should not change without the user's knowledge. Setting
hostkey checking this way is particularly bad, since in this mode
Macfusion will silently connect to a spoofed server a user has
specifically verified in the past (ssh issues a warning, but Macfusion
ignores it and does not present it to the user).

I have removed the options; a user can add them in ~/.ssh/config or in the
Macfusion "SSH Advanced" tab if he actually wants them.
Merge https://github.com/pseudometric/macfusion2

Merging all pull requests as of 3/6/13