Fix unsupported instruction

[Rog3rSm1th]

This PR fixes #103, #89, #83.

It also implements the  dw statements support in the disassembler and the CFG. For example:

func get_data() -> (data: felt*) {
    data_start:
    dw 340282366920938463463374607431768211456;
    dw 1329227995784915872903807060280344576;
    dw 5192296858534827628530496329220096;
    dw 20282409603651670423947251286016;
    dw 79228162514264337593543950336;
    dw 309485009821345068724781056;
    dw 1208925819614629174706176;
    dw 4722366482869645213696;
    dw 18446744073709551616;
    dw 72057594037927936;
    dw 281474976710656;
    dw 1099511627776;
    dw 4294967296;
    dw 16777216;
    dw 65536;
    dw 256;
    dw 1;
}

func main() {
    let (data) = get_data();
    return ();
}

Will be disassembled as:

        func __main__.get_data{}() -> (data : felt*)

LABEL : data_start 
offset 0:          dw 340282366920938463463374607431768211456
offset 1:          dw 1329227995784915872903807060280344576
offset 2:          dw 5192296858534827628530496329220096
offset 3:          dw 20282409603651670423947251286016
offset 4:          dw 79228162514264337593543950336
offset 5:          dw 309485009821345068724781056
offset 6:          dw 1208925819614629174706176
offset 7:          dw 4722366482869645213696
offset 8:          dw 18446744073709551616
offset 9:          dw 72057594037927936
offset 10:         dw 281474976710656  
offset 11:         dw 1099511627776    
offset 12:         dw 4294967296       
offset 13:         dw 16777216         
offset 14:         dw 65536            
offset 15:         dw 256              
offset 16:         dw 1                

        func __main__.main{}()

offset 17:         CALL                0                   # __main__.get_data 
offset 19:         RET