Test against multiple versions of Symfony console.

This ensures backwards compatibility.

Also use existing version of composer on Travis. There is really no need
to download and install our own.
Merge pull request #64 from kasperg/tests-fixtures-timeouts

Improve tests through local fixtures and timeout handling
Merge pull request #65 from kasperg/test-multiple-symfony-versions

Test against multiple versions of Symfony console.
Merge pull request #67 from kasperg/fix-enum-constants

Fix generation of Enum constants which resolve to PHP primitives
Add support for non-standard WSDL namespace aliases
Fixes #40
Added unit test of non standard WSDL namespaces based on Amazon EC2 WSDL.

Ignore generated files.
Fix code style
Merge pull request #68 from kasperg/fix-non-standard-wsdl-namespace

Fix non standard wsdl namespace
Fix imports with relative URLs.

This fixes #35.
Handle situations where the name attribute cannot be determined.
Implement test case for relative import URLs using PayPal WSDL.

Refactor method for testing generated classes.

Added fixtures and ignore test code.