Add various machine fields + SLA machine type and course

[ddabble]

Depends on #447; should change base to dev automatically after that PR has been merged.

New features

• Added machine notes field (edd5ad4cd59179daceab5e53f33bafbe593a273b)
  • This is only for internal use and is not displayed anywhere - except for in the machine change form itself, naturally
• Added machine internal field (21a7c84907617a92546c64d047a12093dde3c70c)
  • This makes machines only visible to and reservable by MAKE members
• Added machine info_message (and info_message_date) field (5f6e73211c2116edf759d498e9fbbdac05562bf0)
  • info_message is for displaying information that's useful to know before using the machine, e.g. the filament that the 3D printer uses, the needle that's currently inserted in the sewing machine, or just the machine's current state/"mood"
  • info_message_date is simply for indicating for MAKE members when the info_message was last changed, which could be useful e.g. when deciding whether the message is outdated or not
• Added SLA 3D printer machine type + sla_course field (0daef10cb10de019f48b49f986cce6cf413cb1f2)
  • Machines of this type are hidden for non-internal users without the SLA 3D printer course (3141d366862cb147de4aae4103b808c808a5b084)
  • Otherwise, works exactly the same as the raise3d_course field (previously named advanced_course; see 3a9b880702b6a1d7da05310efbecd0d91f5d7c18)

Improvements

• Improved info layout code in machine_detail.html (34cb2a0b41f95d087b6841b6b47a16f2a8cd4539)

Other changes

• Renamed advanced_course -> raise3d_course (3a9b880702b6a1d7da05310efbecd0d91f5d7c18)

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Deployment notes

Have to manually add an SLA 3D printer machine type, and associated reservation rules, "all users" quota, and usage rules (can probably copy these from the Raise3D printer machine type).

[codecov[bot]]

Codecov Report

Merging #448 (6de1113) into dev (9dfae91) will increase coverage by 0.08%. The diff coverage is 89.15%.

@@            Coverage Diff             @@
##              dev     #448      +/-   ##
==========================================
+ Coverage   87.95%   88.04%   +0.08%     
==========================================
  Files         134      134              
  Lines        5389     5436      +47     
==========================================
+ Hits         4740     4786      +46     
- Misses        649      650       +1     

Impacted Files	Coverage Δ
announcements/views.py	100.00% <ø> (ø)
internal/views.py	89.56% <ø> (ø)
make_queue/views/admin/quota.py	94.73% <ø> (ø)
make_queue/views/reservation/rules.py	98.88% <ø> (ø)
util/locale_utils.py	92.85% <50.00%> (-3.37%)	:arrow_down:
make_queue/models/machine.py	88.35% <82.50%> (-2.08%)	:arrow_down:
checkin/views.py	43.78% <100.00%> (+2.95%)	:arrow_up:
make_queue/admin.py	100.00% <100.00%> (ø)
make_queue/forms.py	87.71% <100.00%> (+0.76%)	:arrow_up:
make_queue/models/course.py	94.82% <100.00%> (+0.09%)	:arrow_up:
... and 6 more

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