Closes #94 Get all users in an enterprise.

[sohtsuka]

Any comments would be highly appreciated (especially on wording).

[boxcla]

Verified that @sohtsuka has signed the CLA. Thanks for the pull request!

[gcurtis]

Minor wording suggestion - I think the second sentence should be something like "Can be null to not filter the results."

[gcurtis]

Thanks! The code looks really good. I just had a minor suggestion with wording in the docs.

There are also some checkstyle violations that are preventing this from building. If you run gradle build you should be able to reproduce them locally.

:checkstyleTest[ant:checkstyle] /home/travis/build/box/box-java-sdk/src/test/java/com/box/sdk/BoxUserTest.java:13: Wrong order for 'org.hamcrest.Matchers.equalTo' import.
[ant:checkstyle] /home/travis/build/box/box-java-sdk/src/test/java/com/box/sdk/BoxUserTest.java:38:5: File contains tab characters (this is the first instance).
[ant:checkstyle] /home/travis/build/box/box-java-sdk/src/test/java/com/box/sdk/BoxUserTest.java:42: Line has trailing spaces.
[ant:checkstyle] /home/travis/build/box/box-java-sdk/src/test/java/com/box/sdk/BoxUserTest.java:51:78: '+' should be on a new line.
[ant:checkstyle] /home/travis/build/box/box-java-sdk/src/test/java/com/box/sdk/BoxUserTest.java:52: Line is longer than 120 characters (found 125).

[sohtsuka]

Thanks for reviewing. I have fixed the wording and the checkstyle violations, but when I run gradle build I get following errors:

com.box.sdk.BoxFolderTest > createFolderSendsRequestWithRequiredFields FAILED
    com.box.sdk.BoxAPIException: Couldn't connect to the Box API due to a network error.

com.box.sdk.BoxGroupTest > createGroupSendsCorrectRequestAndParsesResponseCorrectly FAILED
    com.box.sdk.BoxAPIException: Couldn't connect to the Box API due to a network error.

I will investigate later.

[gcurtis]

Interesting. I wonder if it's a problem with WireMock. I checked out your branch and built it locally and everything seemed to work. Let me know if you figure out what's causing your build error.