Require ruby 2.0.0, activerecord 4.1

* arel dependency is unnecessary
Update Gemfile, drop jruby support

* Use https rubygems url
* Update appraisal version
* Remove activerecord dependency - it is defined in the gemspec
Update appraisals. Test against ActiveRecord 4.1+
Use mintiest

* Drop support for old Arel versions
Update gemspec, remove ".nonrelease" from version

* Add minitest development dependency
Simplify versioning, prepare for 1.0.0

* Remove versionomy
* Remove Version file

Conflicts:
	Version
Remove semicolons
Remove old AR cache clearing in AdapterTestHelper
Remove old Arel hacks
Remove TaskHacker
Remove unnecessary require
Less code
Cleanup requires, whitespace

* Remove unnecessary empty module declarations for Arel and ActiveRecord
Cleanup patched modules
Move Arel include to the file where the included module is defined
Remove unused rakefile_config
Add LICENSE.txt
Update gemspec

* Include LICENSE
* Cleanup file inclusion
* Relax ruby version requirement to >= 1.9.3

Conflicts:
	rgeo-activerecord.gemspec
Cleanup .gitignore [ci skip]
Remove rgeo from Gemfile (in gemspec)