Removed import that made the thing not compile

It is also not used, so probably the import organizer had a bad day
Extracted the DocumentListener into a variable
Added equals and hashCode for the DocumentListener

The thing that keeps track of them uses these to check for object
equality. Figured this from the code, not the documentation, as
usual.
Merge pull request #18 from caiusb/import-fix

Removed import that made the thing not compile
Merge pull request #19 from altern/sftpPropertiesDialogImpl2

Sftp properties dialog implementation
Keeping track of the documents and the listeners I registered

Because "IDEA" can't give you that info... And if you try to register
the same listener twice, it will log an error, throw an uncatchable
Throwable and... still registers the listener.

Because hey, if I have an error, let's just keep going... What could
possibly go wrong?
Protecting myself from null documents

It happens if you open a document from the .cope folder. Shouldn't
affect outside people, but better safe than sorry.
Bump up recorder infra

To bring changes about common installation code
Added stub installation methods
bump up recorder infra
The IJInstaller
Add public snapshot method
The IJInstallerHelper
Survey operation
Updated the submodule so it builds
Merge branch 'refs/heads/submodule-update'
Merge branch 'refs/heads/master' into snapshot-fix
Merge pull request #20 from caiusb/listener-fix

Listener fix
Remove survey code from component
Extract methods