Add docs button/link to package manager before installing #134
Description
Right now when you use the Ellie package manager you only have access to the package docs once you have added the package to your project. This is not good when confronted with a long list of packages or you don't know which package you want.
I suggest displaying the button to the package docs before installing the package as well. In addition it would be nice to link the package name to the github repo or the package registry page to allow better searching for packages.
Another nice addition would be a last update date for the package to give you another quick way to see if you are dealing with the right package or an outdated/dead package.
For the ultimate convenience a short description or info box on mouse over would make it possible to search for packages without ever leaving the IDE. In the case of an info box you could have a 1 line description, last update date, elm version, package size, etc.
