Two new iPad device models discovered in a developer’s app logs may represent the “iPad mini,” blogged Instapaper creator Marco Arment. The entries were marked as the never-before-seen “iPad2,5” and “iPad2,6,” which Arment speculates are likely Wi-Fi and cellular versions of the new iPad, most resembling an iPad 2, with an A5 processor and a 1024x768 display. Arment notes that he’s “never had a…