This patch changes the second argument of InfoMessage:inform() function
to be either DINFO_DELAY or DINFO_NODELAY with the following
semantics:
DINFO_DELAY - display the message and delay DINFO_DELAY ms before
returning. Save and restore the screen content.
DINFO_NODELAY - display the message and return immediately without
saving/restoring the screen content.
Also, tidy up the call to modBBox() from Shift-X command handler, it
should be unireader:modBBox() and not self:modBBox(unireader) --- there
is no need to pass the reader object to the :modBBox() method.
Thanks to kai771's idea of setting the value of DINFO_TIMEOUT_FAST=1
(in defaults.lua) we can still have the same behaviour of calls to
InfoMessage:inform(..DINFO_TIMEOUT_FAST..) on both the emulator and the
Kindle without the need to manually refresh the page after the call.
Also, now we don't need to set pagedirty=true in filechooser when
displaying a popup window with DINFO_TIMEOUT_FAST flag.
Also, add space to the end of the text messages passed to :inform() for
symmetry.
A lot of manga comes as .zip, and not .cbz (for all intents and purposes, it
is the same thing, just the extension is different). This allows the user to
choose the reader to open her zip files - PDFReader or CREReader, in the same
way she can choose to use PDFReader or PDFReflow for pdf files. I also moved
the list of supported extensions to defaults.lua.
