* yg scripts set reloffer/absoffer only:
Prior to this commit, the yield generator user
level scripts required the user to specify offer
types depending on the wallet, but only 'rel/abs'
distinction is user choice; the other element
(native segwit, p2sh or p2pkh) must be defined
by the wallet, so we now call `wallet.get_txtype()`
to translate from reloffer/absoffer to sw0.. etc.
* Taker chooses nversion, nlocktime per wallet type:
Takers who are still using p2sh-p2wpkh wallets will
not want to flag their transactions with different
tx metadata than previous versions that are still
running, so we check the `get_txtype()` output to
decide which nVersion and nLockTime to use.
Also, the SNICKER locktime is reverted to zero as
according to draft spec.
* change offer type in test_coinjoin
* update docs for bech32 wallets
To facilitate easier management by users and to
follow generally accepted standards, this PR moves
the following all to user home directory, subdir
.joinmarket :
joinmarket.cfg file
wallets/ directory
logs/ directory
cmtdata/ directory
commitmentlist file
User can override location with --datadir option.
An info message is added on startup showing location.
Replace links to instructions in original Wiki with updated
and corrected instructions within USAGE.md.
Add YIELDGENERATOR.md to docs/ with updated and corrected
instructions from original wiki.