Support unencrypted syncany:// link in 'connect' GUI flow
Squashed 'core/' changes from bde59ff..edc787d

edc787d Merge branch 'develop' into feature/issue297-wizard
0e0b27d Fix Base58 code; throw illegal argument exception instead of RuntimeException
7b28ae2 Allow TM.init() to alter the transfer settings (Flickr plugin needs this)
6dd3297 Silence onShowMessage

git-subtree-dir: core
git-subtree-split: edc787d68a940e3ea444f8c3b6139b4be47ecca5
Merge commit '3e5abd2ab006d070a2c7b375f6dff67149d22952' into feature/issue297-wizard
React on invalid/illegal syncany:// link
Squashed 'core/' changes from edc787d..b0350be

b0350be Add GetPassword* messages for WebSocketUserInteractionListener

git-subtree-dir: core
git-subtree-split: b0350bec9bd33f070c5e8a1f38f2acf437a20ae3
Merge commit '3b1b0fd2d2e98dbee2b5ae43ed7cb300fd307966' into feature/issue297-wizard
Implement other 'connect' cases (with/without password)