ENH: Added traceback for error log on pyinotify callback when in debug

Thanks to Helmut Grohne for idea on #fail2ban IRC
BF: fail2ban-client processCmd ret was being overwritten each loop
ENH: Add root user check in xt_recent, and add missing actionstop

Thanks to Helmut Grohne on IRC for suggestion
BF: $EUID not avilable in all shells, replaced with `id -u` in xt_recent
TST: Fix TravisCI build, install of coveralls from pip
Merge pull request #618 from kwirk/xt_recent-tweaks

ENH: Add root user check in xt_recent, and add missing actionstop
ENH: Allow 255.255.255.0 style mask for ignoreip
Merge pull request #624 from kwirk/ignoreip-netmask

ENH: Allow 255.255.255.0 style mask for ignoreip