svn: Removed unnecessary CredentialsCallback, PassphraseCallback - they were previously used to handle password and client certificate passphrase prompts of svn 1.7 command line client which by default runs in interactive mode (currently non-interactive mode is used to run command line clients if not configured to run under terminal)
IDEA-113658 Reuse existing ChangesBrowserNodeRenderer instances on updating model for ChangesListView tree - otherwise ChangesBrowserNodeRenderer instances can accumulate as child components of CellRendererPane (created by BasicTreeUI.createCellRendererPane()) causing memory leak

(For instance, this could be reproduced when "Changes" tool window is hidden and "Update Project" action is invoked several times - CellRendererPane child components list grow on each update filled by new ChangesBrowserNodeRenderer instances)
Merge branch 'svn_18_3'
Maven: ability to override local repository id for maven3 importer
IDEA-121292 Download Sources - does not work for snapshots
IDEA-129877 Gutter grows when editor reaches 99 lines instead of 100