Allow user to pass "PaginationOptions" object with "limit" and "marker"
attribute to every "list" method.
Add toString method to ValidationException.
Bump version.
Update .gitignore.
Add missing headers.
Allow userto only specify a limit or a marker.
Replace PaginationLimitOption and PaginationMarkerOption with support for
builder pattern and method chaining.
Add mockito test dependency.
Test chaining.
Merge branch 'master' into pagination_support

Conflicts:
	pom.xml
Merge branch 'master' of github.com:racker/java-service-registry-client into pagination_support

Conflicts:
	pom.xml
Merge pull request #17 from racker/pagination_support

Pagination support