Changelog for 1.6.0.
Depend on Okio 1.0.0.
Don't use the property bootclasspath; that collides with the javadoc plugin.
Merge pull request #862 from square/jwilson_0524_bootclasspath_collision

Don't use the property bootclasspath; that collides with the javadoc plugin
[maven-release-plugin] prepare release parent-2.0.0-RC1
[maven-release-plugin] prepare for next development iteration
Build Javadoc for OkUrlFactory and OkApacheClient.

Also create a permanent URL for 1.x Javadoc.
Merge pull request #863 from square/jwilson_0524_javadoc

Build Javadoc for OkUrlFactory and OkApacheClient.
Update samples and marketing site.
First couple recipes.
Merge pull request #867 from square/jwilson_0526_first_recipes

First couple recipes.
Don't lose uncaught exceptions.
Merge pull request #868 from square/jwilson_0527_dont_lose_uncaught_exceptions

Don't lose uncaught exceptions.
Recipes for Gson and Caching.
Merge pull request #872 from square/jwilson_0527_recipes

Recipes for Gson and Caching.
Restore Java 7-specific override annotation.

We require Java 7 to build now and this doesn't affect Java 6 at runtime.
Merge pull request #877 from square/jw/java-seven

Restore Java 7-specific override annotation.
Response.isSuccessful().
Merge pull request #878 from square/jwilson_0529_is_successful

Response.isSuccessful().
Expose backwards-compatible response source header.