Wrong inputrc loading order

[tompng]

Description

# Reline.readline
IOGate.prep
read inputrc
IOGate.deprep
# Reline.readline
IOGate.prep
read inputrc
IOGate.deprep

Order problem bug:
Reline reads inputrc after IOGate.prep.
config is not initialized on the first IOGate.prep call.

It will be a problem when implementing bracketed paste.

def prep
  # Enable bracketed paste
  @@output.write "\e[?2004h" if Reline.core.config.enable_bracketed_paste # this config is not initialized yet
end

Performance problem:
Readline seems to read inputrc only once. (warns if inputrc has a problem only once, no warning on inputrc edited after first load)
Reline reads inputrc on every Relin.readline call.

Terminal Emulator

Terminal.app
Not related to terminal emulator

[tompng]

Loading order problem is fixed in #655
Repeated read is fixed in #694