v8 heap snapshot analysis: create back links index; have retained size calculator as tmp indexes host
fix typo in directory name
added comment "don't forget to update version of skeleton generator"

SkeletonGenerator refreshes skeletons only if skeleton version is less than required (see in required_gen_version)
IDEA-134135 Settings: Scopes list shouldn't stick to configurable's borders
fixed possible answer for lesson6/task3
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
EA-31437 - added more diagnostic information
UrlClassLoader caching: a less exposing API
IDEA-124017 (“core” is ignored automatically in IntelliJ VCS)
get rid of double border between editor header component and editor in case of tab placement != top
capitalize JUnit correctly
test project for coverage plugin testing