Erc20 to eos

[emperorhan]

        ACTION issue( name to, asset quantity, string memo );

        ACTION burn( name account, asset quantity, string memo );

        ACTION burnfrom( name burner, name owner, asset quantity, string memo );

        ACTION transfer( name from, name to, asset quantity, string memo );
    
        ACTION approve( name owner, name spender, asset quantity );

        ACTION transferfrom( name spender, name from, name to, asset quantity, string  memo );

        ACTION incallowance( name owner, name spender, asset quantity );

        ACTION decallowance( name owner, name spender, asset quantity );

        ACTION open( name owner, const symbol& symbol, name ram_payer );

        ACTION close( name owner, const symbol& symbol );

[junbeomlee]

plz sign clahub!

[hihiboss]

Please add this copyright to the start of each file!

/*
 * Copyright 2019 DE-labtory
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */