* some cleanups for debugging:

	- move debugging macro's to modest-debug.h (new file)
	- capitalize/rename the macros to make it clearer they are macro's
	- add the new MODEST_DEBUG_BLOCK; example:
		MODEST_DEBUG_BLOCK(
			g_debug ("DEBUG: modest: %s: prompt (not shown) = %s\n", __FUNCTION__, prompt_not_used);
		);
         - this code will *only* run when the MODEST_DEBUG envir var contains "debug-code"
	 - add something like this to your .emacs to make these blocks clear:
		  (font-lock-add-keywords nil
                          '(("\\<\\(FIXME\\|TODO\\|XXX+\\|BUG\\|MODEST_DEBUG_BLOCK\\)"
                             1 font-lock-warning-face prepend))))
	 - some coverity fixes in modest-tny-account.c (free stuff in error cases)
	 - update the manpage

pmo-trunk-r3737