svn: Refactored "svn process finished" logic in CommandRuntime (method extractions)
IDEA-113860 Display dialog if credentials for certain repository are asked more than one time during single command execution (treat such situation as "previous credentials were wrong")
svn: Unify credentials caching in memory logic for ssh and other protocols
IDEA-113730 Implemented content retrieval using export command (this eliminates encoding issues and correctly handle binary formats)
Merge branch 'svn_18_2'