Fix wrong value types & added typescript decorators & some refactoring

[Vovencia]

In this code has some wrongs (block 1):

    var reads = [
      ['riff_head', 'string', 4],
      ['chunk_size','uinteger', 4],
      ['wave_identifier', 'string', 4],
      ['fmt_identifier', 'string', 4],
      ['subchunk_size','integer',4],
      ['audio_format','integer',2],
      ['num_channels','integer',2],
      ['sample_rate','uinteger',4],
      ['byte_rate','integer',4],
      ['block_align','integer',2],
      ['bits_per_sample','integer',2],
      //['uhm','integer',2],
      ['data_identifier','string', 4],
      //['sub_chunk2_size', 'integer', 4],

    ]

And this (block 2):

else if(read[1]=='integer'){

          read_result[read[0]] = buffer.readUInt16LE(pointer, read[2])
          pointer = pointer + read[2];
        }
        else if(read[1]=='uinteger'){

          read_result[read[0]] = buffer.readInt32LE(pointer, read[2])
          pointer = pointer + read[2];
        }

there is some confusion here..

All int values should be unsigned: readUInt32LE not readInt32LE

int16 = 2 bytes
int32 = 4 bytes

in block 1 some types incorrent by int size

So.. to avoid confusion, i am change type names:
uint16 name for 2 bytes int & uint32 name for 4 bytes int

In you logic, integer -> 2 bytes, uinteger - 4 bytes

Block description 1:

here:
['subchunk_size','integer',4],
type is 2 bytes ( integer ), but real size 4 bytes

and here:
['byte_rate','integer',4],

P.S.
Sorry for my english..