Fixes for Rails 4 database setup; fix Rakefile for Rubygems 2.0
Merge pull request #53 from GUI/master

Fix database setup rake tasks under jruby/jdbc adapter
Don't try to modify geometry_columns as a table under PostGIS 2
Merge branch 'master' of github.com:dazuma/activerecord-postgis-adapter
 Refactor db rake tasks: extract #set_psql_env.
Take into account PGUSER environment variable in db rake tasks.
Merge pull request #55 from MitinPavel/master

Database rake tasks take into account "username".
fix nil exception when using with rails 4
Updated to use conditional assignment, instead if checking for .nil? condition
Merge pull request #60 from ivanfoong/master

Fixed Rails 4 db:migrate broken - undefined method `delete' for NilClass
Additional compatibility fixes for Rails 4.0.0 rc1
Additional fixes and tests related to spatial migrations and schema dumping
Fixes for PostGIS 1.5; factor out a few more common methods
Fix crash when handling array conversions
Fix compatibility issues with rake db:gis:setup
Raise a more useful exception on Rails4/JRuby
add missing '=' to db:gis:setup tasks
Small fix for db:gis:setup task
Merge pull request #69 from jdurand/patch-1

Small fix for db:gis:setup task
Merge pull request #67 from rhodrid/missing-assignment

Add missing '=' to db:gis:setup tasks