* Add Codex artifacts to the .gitignore
* Set Codex version using a variable
* Set download source based on the network
* Use multiple bootstrap nodes for Codex Testnet
* Show download online hint to the checksum file as well
* Accept user provided ethereum private key to save it locally
* use Windows convention for batch file newline
* remove utils.bat as function definitions were not being exported
* add permissive CORS (for UI) and longer default TTL
* bump to 0.1.5
* add workaround for antivirus webshield
* update missing refs to 0.1.5
* Add .gitattributes
* Update Codex version to the v0.1.6 release
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Co-authored-by: Slava <20563034+veaceslavdoina@users.noreply.github.com>