Adjusted conditional statements to use instanceof when
comparing variables. Instanceof supports inheritance type
checking better than type.
Change-Id: I4ee0004934dc2322d43ef07e797a6811e39a812c
Closes-Bug: 1548530
* Hides previously broken --page-size option
* Adds --property to image list for filtering on properties
* Adds Visibility, Protected, Owner, Properties/Tags to --long output
* Adds api.utils.simple_filter() for selecting matches out of a list
of objects
* Adds tests for all of the above
* Updates image docs
There are additional filtering options to be added in later reviews.
Change-Id: I32feff0ad61aae749b33621c817658d7dc90c3aa
Closes-bug: 1401902
