Standardize event-handlers naming convention (on, onbefore, onafter)

[cedricfrancoys]

For now (on, onbefore, onafter)

• ondelete = onbeforedelete
• onupdate = onbeforeupdate
• oncreate = onaftercreate (!)

alternate notation: oncreate(before)/oncreated(after), onupdate(before) /onupdated(after)

Global methods (oncreate, onupdate, ondelete) conflict with fields and are ambiguous regarding their execution timing
They are still useful, but we should :

1. discourage their use
2. always use the explicit version (onbefore… or onafter…)

• oncreate / onaftercreate
• onbeforeupdate
• onafterupdate
• onbeforedelete
• onafterdelete