Fix retry of remote skeleton generation after vagrant start (PY-13174).
Some results from goto symbol are missed in SE IDEA-126559
better where/from completion (DBE-225)
Gradle: fix compatibility with Gradle 2.0
Merge remote-tracking branch 'origin/master'
@NotNull/Nullable
[vcs] IDEA-122530 Fix deadlock in VCS instantiation

* VcsEP: still allowing non-synchronized component instantiation,
  synchronize access to myVCS to ensure myVcs is always the same.
* getByName: don't sync access to getVcs since it is synchronized
  internally.
Remote interpreter library paths handling rework.
Merge remote-tracking branch 'origin/master'