Stopped idris-load-file from unconditionally erroring
Replaced key specifiers like [return] with ?\ escapes.

For some specifiers, I was either unable to test them or could not find a
suitable replacement. These have been left alone and still don't work for me.
Changing "\t" to [?\t] for consistency
Merge pull request #31 from trillioneyes/fix-keymap-declarations

Fix keymap declarations