Conventions

[jecisc]

Could be great to add a guide on Pharo convensions.

• Instance var begins with a lower case
• Class var begins with an upper case
• Classes begins with an upper case
• methods begins with a lower case
• A test package is in the form MyPackage-Tests
• A test class name is MyClassTest
• Explain conventions on some protocols
  ...

[jecisc]

I init the file. We should complete it later.