V0.8.7.6 fractal upgrade

Changelog

Version bump to v0.8.7.8
GUI overhaul (user interface upgrade)
Added intuitive import private key functionality (GUI and RPC)
Added locking functionality for X-Node collaterals
Added new graphics
Implemented NFT contract storage method (suitable for prototype test only)
Initial implementation of partial fractal framework. This currently functions as only a test

Added BVAC system, try it out in the "receive" tab (generate BVAC) A jpg image will be created in the same directory as your wallet that you ran.

Fixed naming of BVAC system (some files and references were mislabeled)
Finished BVAC encoding (save to image)
Finished BVAC decoding (read from image)
Added BVAC implementation to "Send Coins" Qt page for user testing
Finished BVAC implementation in "Receive" Qt page for user testing Users can now select where the way to read or write BVAC files from/to

Extensively Updated Readme documentation
Version bump
BVAC fixes in fractalbvac.cpp
Defined dual layer obfuscation
Added fractal obfuscation logic
Added fractal de-obfuscation logic
Added fractal contract read/decode method
Added decode logging for verification of smart-contract handling
Updated syntax and syntax handling for smart-contract data stored by the data-obfuscation system
Updated decode function handling
Added character matching from decoded/de-obfuscated data
Completed encode/decode handling
Added message to inform user of test smart-contract write to compliment the reading message committed prior.
Added Image Parsing for NFT minting | WARNING: 100x100 is maximum at this time!
Added Fractal NFT writing function
Added UI Test functionality (test parsing successful!)
Expanded data obfuscation method's size handling capabilities.
Upgraded image handling method for both NFT and BVAC functions
Updated .pro file (fixes build issues for Qt users)
Staged BVAC for upcoming dual format support (JPG and PNG)
Updated Fractal engine contract handling to include NFTs
Slimmed down Fractal data obfuscation handling
Updated Fractal data obfuscation to include NFT handling
Added NFT Rendering
Updated NFT Minting/Encoding
Added basic UI controls for testing