change definition and start with alpha-shape
Merge branch 'master' of github.com:homeostasie/convergents into report
add full
add contexte and motivation figures
Merge pull request #61 from homeostasie/report

Report - contribution + plan non détaillé de dev info et conclusion.
commute star operand
Merge pull request #62 from homeostasie/starOperator

thanks
Merge branch 'master' of github.com:homeostasie/convergents into class-cleaning