tests: change coding style and auto check the coding style. (#63)

doc: bumped version to 0.32.

doc: we work with nginx cores as new as at least 1.13.6.

doc: bumped version to 0.31.

doc: bumped version to 0.30.

doc: bumped version to 0.29; also stated that we work with nginx 1.7.10.

doc: bumped version to 0.28.

bumped version to 0.27.

doc: v0.26 release.

minor coding style fixes.