Revert "Tempfile isn't IO's subclass."

This reverts commit f87d9bef2792a31ad18cb1dda5e6c39ca310d25b.
explicitly require 'tempfile'
spec update
support fetching page token with specifying "fields=access_token" query param
add missing file
page settings first commit
page setting specs
page tabs first commit
fix tabs and tempfile.== related bugs in 1.8.7
Page#tab!
page samplejson update
v1.9.3
Page#settings, Page#tabs support
bundle jruby-openssl for JRuby
delegate Connection#total_count to Collection#total_count
finally start working Facebook Credit APIs again!
use :source instead :image for file upload
order update
now refund works!
close #93
OAuth migration first commit
(spec still failing)
revoking given permission