Fixed exception on unknown parameter type

Raises exception for parameter types that doesn't match any of validators.
nil parameter is still allowed.
Fix for concern substitution spoiling parameter names

Concern substitution was spoiling parameter names that could not be replaced.
Eg. parameter :name ended up as :":name" at the function's output.
Good bye 1.8.7 and 1.9.2 in Travis

We care only for 1.9.3 and 2.0.0 right now
Merge pull request #137 from tstrachota/missing_validator

Fixed exception on unknown parameter type
Merge pull request #139 from tstrachota/concerns

Fix for concern substitution spoiling parameter names
Correct expected_type for parameters taking arrays
Merge pull request #136 from tstrachota/type_validator

Correct expected_type for parameters taking arrays
Support custom views when running apipie:static
Add documentation for rails g apipie:views
Authentication support
Merge pull request #146 from noplay/authenticate

Authentication support
fix in a comment typo
Merge pull request #147 from scrooloose/fix-comment-typo

fix a comment typo
support multiple arrays in api_controllers_matcher
typo
remove debugging
Merge pull request #148 from liorsion/master

support multiple arrays in api_controllers_matcher
Bump version
Use StandardError instead of Exception.
Merge pull request #149 from kaleworsley/standard_error

Use StandardError instead of Exception