Add missing endpoints

[mmktomato]

Resolves #23

• Add missing endpoints.
• Put warning messages when using deprecated endpoints.
• Re-format comments.
  • Omit numbers.
  • English urls.
  • nulab-inc.com to nulab.com.

TODOs

• [x] Manual test for added endpoints.
• [x] Manual test for deprecation messages.

[mmktomato]

@vvatanabe Could you please review this?

[vvatanabe]

@mmktomato OK! I will chk it ASAP :D

[vvatanabe]

@mmktomato I checked new api's below. Super Thanks! LGTM!

• [x] getProjectStatuses
• [x] postProjectStatus
• [x] patchProjectStatus
• [x] deleteProjectStatus
• [x] patchProjectStatusOrder
• [x] deleteIssueComment
• [x] getIssueParticipants
• [x] getTeams
• [x] postTeam
• [x] getTeam
• [x] patchTeam
• [x] deleteTeam
• [x] getTeamIcon
• [x] getProjectTeams
• [x] postProjectTeam
• [x] deleteProjectTeam