Update/format code to conform to solidity guidelines. No changes in functionality.

[eccentricexit]

This reformats code to conform to solidity style guidelines. Also makes public functions visibilities explicit, solving #24 .

No tests fail.

Summary

• swap deprecated "constant" modifier in favour of "view";
• 4 spaces indentation;
• use double quotes instead of single quotes;
• swap deprecated contract name function in favor of "constructor";
• use exactly one space on each side of "=" in assignments;;
• add "emit" keyword before event emissions;
• make function visibility explicit.

[jellegerbrandy]

Many thanks, Matheus, this was much needed.
I get a compilation error locally, probably because I need to update the compiler. Can you please update package.json with the new versions?

[eccentricexit]

I've updated truffle in the package.json. This might also solve #51

[jellegerbrandy]

A few remarks:

• we still have of compilation warnings on compilation. Just wanted to check if you are aware of this :-) (you can see them in the circleci build, in the compilation step: https://circleci.com/gh/Paratii-Video/paratii-contracts/164?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link)

• I've made some emergency changes yesterday on dev, and there were merge conflicts. I created a new branch https://github.com/Paratii-Video/paratii-contracts/tree/mtsalenc-fix-visibility-warnings . We can either continue working on that branch (slightly easier to work together, I'll give you access) or you can merge it into your fork.

• we have switched from npm to using yarn in most of the projects (and so we should not use package-lock but yarn.lock for pinning the refs)

I'll also merge this as is, but it would be nice to catch all the warnings :-)

thanks again!