Add placeholder documentation guides
Rename functionality added to BoxFile

The rename() function is modeled after BoxFolder's rename() function
Merge pull request #20 from sarattall/box-file-rename

Rename functionality added to BoxFile
Update README with beta info
Change placeholder doc messages
Fix typo in README
Add guide for collaborations
Add search guide
Fix getChildren() to take an array of fields
Add BoxItem.ALL_FIELDS constant

This constant combines the fields of files and folders so that all
fields can be retrieved when getting a folder's children.
Fix typo in BoxAPIConnection javadoc
Add javadoc to BoxItem.ALL_FIELDS
Add a PartialCollection class

This class will be used when retrieving a range of children in a folder
or a subset of any paged request.
Tweak javadocs for PartialCollection
Add getChildrenRange() method to BoxFolder

This method can be used to retrieve a range of the folder's children
specified by an offset and limit.
Add test for getChildrenRange with fields
Added package to package-info.java
Merge pull request #22 from TLuthra/master

Added package to package-info.java
Fix newline checkstyle violation
WebLinks cause an exception in getChildrenRange()

WebLinks should be ignored for now until they're fully supported in the
API.