group parameters added and worked. Need some tests.
web interface: added pictures, some modules, descriptions of devices
small changes in web
merge with nikolay
power_control: added
Merge branch 'niksh-dev' into dmitryhd-dev
small syntax error in alerts fixed
power control: cosmetics
rmu snmp params fixed; mysqldb refactoring; collector added command line parameter
Merge branch 'dmitryhd-dev' into niksh-dev

Conflicts:
	nms_app/alerts.py