Adding exception for Piwik (open source Google Analytics)
Merge branch 'master' of github.com:fzipi/owasp-modsecurity-crs

Conflicts:
	base_rules/modsecurity_crs_40_generic_attacks.conf
	base_rules/modsecurity_crs_41_sql_injection_attacks.conf
	base_rules/modsecurity_crs_41_xss_attacks.conf
Adding exception for Piwik (open source Google Analytics)