add json logger and instrumentation
fixed instrumentations
update vx-service_connector gem
create vx/instrumentation
using gem vx-instrumentation
add handle_exception middleware
remove N+1 query in user_repos#index
remove N+1 queries on projects#index
update vx-instrumention gem
add last_build columns to project
cache project last_build
change travis build script
call Airbrake in exception handlers
fixed travis build script
fixed travis build
add ENV[VX_COMPONENT_NAME]
changed defaul component name
change log level on production
Merge branch 'logger'

Conflicts:
	Gemfile
	Gemfile.lock