set version 0.5.0

rc4

rc3

bump version

Update dockerRelease.sh

Update version.go

Merge pull request bosun-monitor#1331 from bosun-monitor/placeholders

a few simple placeholder conf items to ease timing on future migration.

Fixing build for solaris

Update version for release

Merge pull request bosun-monitor#988 from bosun-monitor/releaseVersions

Release versions