base_user_module - commands for user
moved command from user to base_user_module
adjusting user commands for base_user_module (not finished yet)
added split_params_base tpl and split_params_std func
rewriting commands' functions in base_user_module
removed old headers and sources and added new
removed old headers
new constructor for message_composer which provides ability to set body during initialization
provided get_group() method
fixed mistake in split_params_base, added concat_pieces
improved base_user_module's commands
new version (version 0.2.0 omitted by mistake) 0.3.0-alpha