Switch to stable + Fix CORS

[reneklacan]

• Switch to stable Rust
  • The only thing that needed nightly was rustfmt's imports_granularity which I
    believe is small price to pay for switching to stable
• Fix CORS preflight requests (info on options conflicted with CORS
  layer preflight logic and was breaking web JS client) by moving info
  headers to included in all requests

[s3rius]

Thanks you very much. If you tried to fix rustus that is published on docker hub, then it won't work, because version on master branch is different to what is published on hub.

I will try to update the project and will publish it on hub this or next week.

[reneklacan]

@s3rius version in dockerhub actually worked ok but then when I switched to building image from latest code (develop branch), I ran into CORS issues and these changes fixed them

[reneklacan]

@s3rius do you want me to fix failing lint or do you just plan to address this in a different way? I'm fine either way!

[s3rius]

I'd love if you will fix it.

[reneklacan]

@s3rius cool, pushed fixes

[s3rius]

Seems good to me.