ltc segwit locking script

Fix ltc decode segwit (#8)

* create locking scripts for bech32 properly

ltc validation

v1.7.2

ltc validation for legacy address p2sh (#7)

quick fix - output prefix multicoin switch

v1.7.1

add coin switch for output generation

Multi coins

Multi coins (#6)

* add multi coins support

* add tests for ltc

* add default method

* update version

Bech32 outputs

v1.6.0

increment version

hot fix allow dust with no change output

Dev (#5)

hot fix
allow dust with no change output

Disallow change outputs less than dust

disallow change outputs less than dust

Add method to add null unspendable output to builder

Dev (#3)

* add null unspendable output to the builder

RBF and Null data outputs

Dev (#2)

* Add replaceable transactions

* add builder for replaceable

* sequence replaceable as member of input class

* allow outputs with zero amount

* increment version

RBF transactions

Added support for RBF transactions