Fixing issue #258, bad keyfile permissions.

This spits out a warning to the console, but ideally it would also
issue a warning to the GUI for those who didn't start it from the
console. N.B. the warning is a one shot thing, since it fixes the
problem in a way essentially undetectable in the future, so it
should be done right if it is to be done at all.
Maybe we should even disable all keys automatically if the keyfile
is found in an insecure state.
Fix #263 & #262: insecure keyfile permissions.

* Added conditional to keyfile fix code that excludes windows.
* Cleaned up old keyfile permissions fix.
* Added umask (not conditional against Windows, because I don't think that is necessary).
Make warning message more specific.
Merge branch 'master' of https://github.com/Bitmessage/PyBitmessage into keyfile_perm_fix
Merge branch 'master' of https://github.com/Bitmessage/PyBitmessage into keyfile_perm_fix
No paranoid key disable for bad keyfile perms.
Spelling.
Logging fixes.
Don't propagate loggers; add some logging.
These changes slipped from last commit. Sorry.
Merge branch 'master' of https://github.com/Bitmessage/PyBitmessage into keyfile_perm_fix
Merge branch 'no_propagate_loggers' into keyfile_perm_fix

Conflicts:
	src/shared.py
Switch an stderr message to logger.
Updated bitmessageui for search.
Clarify IOError handling with comment.
Generated py for search.
Inbox search.
Sent search.
Fixed crash on sql query.
Packaging for multiple distros