Merge pull request #449 from tazz2004/1.7-dev

Cleaning up bitcoin from the UI
Made it clearer how coins are chosen for use when making a transaction, by switching from COIN as constant
to DUST_SOFT_LIMIT.
change valid base58 key test data to doge network
Merge pull request #450 from patricklodder/base58_unit

adapt base58 testdata
Modified expected values in wallet tests to take into account the numerically higher transaction costs of DOGE.
Changed constant used in calculating most applicable coin to use in a transaction, from COIN to DUST_SOFT_LIMIT
Scaled up units when testing dust-avoidance in wallet.
Shifted unit in wallet tests from CENT to COIN as a base, to avoid problems with dust avoidance code.
Reworked comment around the code for identifying transactions to spend, to separate explanation of condition, and result.
Corrected comment references to "cent", with "coin" in wallet tests, to match changes to units.
Rebuild RPC signing test with Dogecoin multisig address and private keys.
Merge pull request #451 from rnicoll/1.7-dev-tx-fee

Correct unit tests for wallet
s/Bit/Doge in wallet encryption dialog
Spaced en dashes for breaks. 

Rather than spaced hyphens.
Introduce missing carriage return (newline).

Per pattern in immediately preceding chart.
Merge pull request #462 from janaspage/patch-8

Introduce missing carriage return (newline).
Un-spaced en dashes for ranges. 

As an option to previously requested pull for spaced en dashes: https://github.com/dogecoin/dogecoin/pull/460
removed the "DIGISHIELD RETARGET" message that was spammed in console.
Merge pull request #466 from patricklodder/1.7-dev-rm-digishield-retarget

[minor] removed digishield message
Merge pull request #465 from janaspage/patch-9

Un-spaced en dashes for ranges.
Merge pull request #459 from janaspage/patch-5

Spaced en dashes for breaks.