Merge pull request #2 from sjmackenzie/master

License
shorten ui port names
Create CONTRIBUTING.md
refactoring ui components, add basic events and entry widget (perhaps bug in this last one)
with all files...
Escape the array port argument
label widget added and display do System.show instead of Browser.browse
add placeholder
example with modifiers and events
new version of complex events
rename input ports and output ports for ui components
merge and placeholder + examples
simplification in example
simplification in example
Merge branch 'master' of https://github.com/dmichiels/fractallang
remove getCache in graph
remove getCache
basic components for canvas widget
replace string.oz by ipEdit.oz, better logic
canvas components ok (test in testCanvas.fbp)