Gowut v1.2.0 public release

Changes and new features in v1.2.0:

• BREAKING CHANGES! Renamed several interfaces and methods to conform to Go
  naming conventions. Gometalinter now gives 0 warnings.
  Sorry. Better sooner than later. The changes are the following:
  • Comp
    • Id() => ID()
  • Container
    • ById() => ByID()
  • HasUrl => HasURL
    • Url() => URL()
    • SetUrl() => SetURL()
  • Html => HTML
    • NewHtml() => NewHTML()
    • Html() => HTML()
    • SetHtml() => SetHTML()
  • Server
    • AppUrl() => AppURL()
    • AddRootHeadHtml() => AddRootHeadHTML()
    • RemoveRootHeadHtml() => RemoveRootHeadHTML()
  • Session
    • Id() => ID()
  • Window
    • AddHeadHtml() => AddHeadHTML()
    • RemoveHeadHtml() => RemoveHeadHTML()
    • SetFocusedCompId() => SetFocusedCompID()
• Renamed github.com/icza/gowut/examples to _examples, making it excluded from
  build tools by default. You can still run the examples using "go run".
• Window list has been rewritten to use Gowut components.
• Encoded form of AppPath is used when specifying Cookie paths.
  For details, see issue #27.
• Session creation and removal messages are now only logged with log.Println()
  if no logger is set at the Server.
  For details, see icza/gowut.dev#7
• Development of gowut has moved from gowut.dev project to the dev branch of
  the gowut project.