cwFlowNet._connect_vars() changed to cwFlowTypes.var_connect().
cwFlowTest._set_var_value_from_cfg() to cwFlowTypes.var_set_from_preset().
var_channelize() now connects matching channels when they are available.
Added type 'numeric'.
Updated proc_template() to automatically allocate and extract inst_t.
Added a system sample rate.
Added ability to set types at proc instantiation time.
Added ability to have multi-type variables which get resolved at proc. instantiation time.
Added ability to proc 'log' attribute to print selected variables as they change.
Values are now coerced to the variable type in var_set().
Added new proc's : list,add,preset.
