Set default pgversion to 9.0, removed unnecessary comments
Merge branch 'master' into 5294

Conflicts:
	etc/cmd_standby.ini.sample
Set default data directory for postgres 9.0
Removed code for 8.2
Typo
Added check to enforce minimum postgres version of 9.0
Updated documentation to be compatible with 9.0+, removed/changed references to lower versions
Merge branch '5294'

Conflicts:
	doc/cmd_standby.README
Merge pull request #36 from zamatcmd/master

#5294 - Removing support for Postgres < 9.0