`schedule` command issues

[OrangeJuice7]

Hello W13-3, I was one of your reviewers for the PE Dry Run but I did not submit my issues to the private repo, so I'm submitting them here instead. (https://github.com/nus-cs2103-AY1819S1/forum/issues/144) Thank you for bearing with me. Now for the actual issue itself:

The schedule command has the following sub-issues:

• The example in the user guide does not use the event/ prefix, does not have the : in the start and times, and does not have the description field. The example command is rejected as invalid in the app.
• When I enter an invalid event name (e.g. empty name), it is feedbacked that "Event names should only contain alphanumeric characters and spaces", but the "event" parameter accepts characters such as ^ and ,
• The "date" field is specified to be "formatted as dd/mm/yyyy, dd-mm-yyyy, or dd.mm.yyyy", but 01.01.1999 and 01/01/1999 are invalid dates.
• The date is only accepted if the year is 1600 or later. This restriction was not mentioned in the command help or user guide.
• The description field "should only contain alphanumeric characters and spaces" as well, but it accepts ^

[andrewtanJS]

Hi @FongYuan, thanks for pointing these out! I'll look into these at once.

[andrewtanJS]

updated - resolved #102