Mandatory wallet update - V1.3.1.0 release

Was trying to delay this as long as I could since last mandatory update but time has come to finally do it before we hit Stex.com & Crex24.com.

There was few things missing in last version and few issues came out in meantime which I believe we tooked care of. Below list of changes we implemented:
- overall source optimization & improvements
- sync speed increase
- added minimal stake weight equal 15
- checkpoints update
- coin maturity increase from 1 hour to 3 hours
- block reward change from 80/20 to 90/10 on phase 18
- obfuscation off on spork
- 5% dev fee on spork (never mentioned this but since I want to be as fair as possible, we can vote as a community if you agree to this or not)

⚠ Make sure to do a wallet.dat backup before update for your own safety! ⚠

⏳ Please keep in mind that the sooner we update, the sooner we return to the CryptoBridge ⏳

// removed //

Github https://github.com/altbet/abet/releases/tag/v1.3.1.0
Windows https://github.com/altbet/abet/releases/download/v1.3.1.0/altbet-v1.3.1.0-win-qt.zip
MacOS https://github.com/altbet/abet/releases/download/v1.3.1.0/altbet-v1.3.1.0-macos.dmg
Ubuntu 18.04 QT https://github.com/altbet/abet/releases/download/v1.3.1.0/altbet-v1.3.1.0-ubu1804-qt.tar.gz
Ubuntu 16.04 QT https://github.com/altbet/abet/releases/download/v1.3.1.0/altbet-v1.3.1.0-ubu1604-qt.tar.gz
Bootstrap https://github.com/altbet/bootstraps/releases/

🆘 Guides & Scripts 🆘

// removed // - Shell script to install a Masternode on a Linux server running Ubuntu 16.04
// removed // - Shell script to update a Masternode on a Linux server running Ubuntu 16.04
// removed // - Resolves issues with sync / connection

Stay tuned // removed //

- Altbet Team