Updated version to 0.8.2

Updated version tagging and changelog for v0.8.1 release

Updated version to reflect v0.8.0

Updated version and changelog to reflect v0.7.1

Updates vim doc for v0.7.0

Updated vim doc for v0.6.1

Merge branch 'delphinus35-for-powerline'

Updated changelog for v0.5.4

Updated changelog for v0.5.3

Changes for official v0.5.2 release