Fixed more errors cased by IntelliJ changing git4idea in IDEA14 EAP

- GitHttpAuthDataProvider getAuthData interface changed
- GitLineHandlerPasswordRequestAware removed as obsolete
  - See: https://github.com/JetBrains/intellij-community/commit/f3eb2b26b6d434fad428f447758dae1dbf4876bf
Merge pull request #115 from d9n/intellij14+pullrequest

Fixed compile errors cased by recent git4idea changes in IDEA14 EAP