(2.0) Live templates

[MicroNovaX]

I propose to add live templates to the most frequently used pieces of code.

Ex:

1. Bounce check bche
   if (flags & 1) { throw(error::bounce()); return (); }
2. recvi

() recv_internal(int my_balance, int msg_value, cell in_msg_full, slice in_msg_body) impure {
    
}

3. recve

() recv_external(slice in_msg_body) impure {
    
}

4. gete

_ my_get_method() method_id {

}

and etc.

[andreypfau]

i purpose use getm for 4. as an abbreviation of get method