Compatibility with IDEA 15

(cherry picked from commit 5281edb)

Compatibility with java 6

(cherry picked from commit 0be9c40)

[formatting] add space between empty statements inside for clause

[dlv] update up to 0.10.156

Temporary disable inspections

Merge pull request go-lang-plugin-org#2040 from dlsniper/covermode-at…

…omic

Use covermode atomic for tests coverage (fixes go-lang-plugin-org#2037)

Merge pull request go-lang-plugin-org#1921 from dlsniper/remove-doubts

Clarify supported builds

Fix sdk-aware tests on IDEA 15 EAP

add usage trigger for dlv

Merge pull request go-lang-plugin-org#1806 from eugene-auduchinok/on_…

…the_fly_optimize

Fix exclude paths for non-Golang files