Support Major-Only Version Scheme

[commonsensesoftware]

According to the Microsoft REST API guidelines for versioning, a major-only version scheme should be supported. If a client only provides the API version as "1", then the minor version should implicitly be inferred as ".0" or zero. In other words, the API versions 1 and 1.0 should be equivalent. The equality and comparison methods for the ApiVersion class currently treat them as being different.

Examples

GET /foo?api-version=1 HTTP/1.1
host: localhost

GET /foo?api-version=1.0 HTTP/1.1
host: localhost

GET /foo HTTP/1.1
host: localhost
api-version: 1

GET /foo HTTP/1.1
host: localhost
api-version: 1.0

All of these requests should be treated as semantically equivalent requests.