feat(PID-1-SHT6):REV A:Initial draft

Drew groups 21-25 (valves, pipe fitting, pipe)

new file:   DEL/BK-2020-04-PID-1-SHT6.pdf
modified:   DWG/BK-2020-04-PID-1-SHT6.svg
modified:   REVISIONS.org
modified:   TODO.org

hold(PID-1-SHT6):REV A:Pausing drawing temporarily

Taking break.

feat(PID-1-SHT5):REV A:Initial draft.

Contains groups 18-20.

new file:   DEL/BK-2020-04-PID-1-SHT5.pdf
new file:   DWG/BK-2020-04-PID-1-SHT5.svg

fix(PID-1-SHT3):REV C:Fix legend arrow color

fix(PID-1-SHT4):REV B:Fix legend arrow color

feat(PID-1-SHT-4):REV A:Initial draft

Draw diagram for symbols in ISO 10628-2:2012 Groups 10-17.

  new file:   DEL/BK-2020-04-PID-1-SHT4.pdf
  new file:   DWG/BK-2020-04-PID-1-SHT4.svg
  modified:   REVISIONS.org
  modified:   TODO.org

chore(TODO):Update task list

Update projected groups that sheets will contain.

Merge branch 'feature/pid-1-sheet-3/BK-2020-04' into develop

fix(PID-1-SHT3):REV B:Fix title group nums and metadata

chore(TODO):Update task list

feat(PID-1-SHT3):REV A:Initial draft

Merge branch 'develop' into feature/pid-1-sheet-3/BK-2020-04

fix(PID-1-SHT-2):REV F:Fix minor text misalign

draft(PID-1-SHT3):REV A:Add more symbols

style(REVISIONS.org):Minor column header changes

Merge branch 'develop' into feature/pid-1-sheet-2/BK-2020-04

Update and combine sheet 2 branch's REVISIONS.org file.

 Conflicts:
REVISIONS.org

style(REVISIONS.org):Remove superfluous field in rev histories

"Identification code" not needed multiple times since history is
already segmented into multiple lists by this same field.

style(PID-1-SHT-2):REV E:New layer:group partition objects

style(REVISIONS.org):Change format to be more diff-compatible

Break up revision list into two lists:

1. File Locations
2. Revision History

Note: A benefit of having individualized histories of each file is
that it allows a future "Revision History" section to be added to a
drawing. Also, updates to `REVISIONS.org` will be easier to merge.

fix(PID-1-SHT2):REV D:Fix minor text misalign

fix(PID-1-SHT2):REV C:Remove errant line

merge(PID-1-SHT2):REV B:Merge in sheet 2 changes

Merge required instead of fast-forward since REVISIONS.org also
changed.

Merge branch 'feature/pid-1-sheet-2/BK-2020-04' into develop

Conflicts:
REVISIONS.org

style(PID-1-SHT1):REV D:Align symbols

Align symbols on sheet 1 so they match sheet 2.

style(DWG,pid1sht2):Align group titles, fix legend

style(DWG):Group symbols, fix legend

fix(TODO.org):Fix minor typo

feat(DEL):Add PDFs of initial drafts of drawings

feat(DWG):Add initial drafts of drawings

chore(IMG):Add draft symbols for vessels and tanks (Groups 1,2)

feat():Add REVISIONS and TODO file

REVISIONS.org - Track drawing revisions
TODO.org - Project task list

feat(REF):Add cost estimate for ISO eng dwg standards

feat(.gitignore):Add ignore file

init(README):Init repo with README