Better granularity for validation configuration

Enables to turn on/off validation and presence checking separately.
Merge pull request #108 from tstrachota/separate_validations

Better granularity for validation configuration
Fix running with RDoc-4.0.0
Merge pull request #110 from iNecas/ruby2-rdoc4

Problem installing with Ruby 2.0 + RDoc 4.0
Rename validate_type to validate_presence

Validate_type option was not part of any release yet, no need for deprecation.
Merge pull request #111 from iNecas/validate_value

Rename validate_type to validate_presence
Bump version number
SEO - make description more descriptive

rubygems.org use that value for describing the gem, the previous sentence was not so easy to search.
doc: Remove path from resource_description
[Fixes #109] Nested resources with undefined base urls.
Clickable travis link, test against 2.0.0
Merge pull request #116 from johanneswuerbach/namespaced_resources

[Fixes #109] Nested resources with undefined base urls.
Merge pull request #117 from johanneswuerbach/travis

Clickable travis link, test against 2.0.0
Add an example in the Readme about how can we select the example queries, by using a filter in RSpec.
Merge pull request #119 from Nerian/rspec_example_filtering_tests

Add an example in the Readme about how can we select the example queries  by using a filter in RSpec.
Fix code snippets displaying for show_in_doc in rspec tip
Merge pull request #114 from sheerun/patch-1

doc: Remove path from resource_description
Fix tests

Minitest 5.0 doesn't play nice with rspec
Fix loading issues

The previous code might cause loading of some files twice, breaking
concerns.

Fore more info see http://projects.theforeman.org/issues/show/2564
Merge pull request #129 from iNecas/fix-rake-controller-loading

Fix loading issues