Revisions to documentation

[KevinKingFonts]

Split current README.md into individual .md files for each Syllabics community category:

• [x] README.md file with brief description of repo + table of contents (with relative links)
• [x] Ojibway
• [x] Cree
• [x] Blackfoot
• [x] Inuktut
• [x] Carrier
• [x] Dene
• [x] General recommendations (SyL wide space; numerals, punctuation, w-dot design)
• [x] Kerning section

Kerning data:

• [x] Add Carrier kerning pair set to data
• [x] Add punctuation list to data + pairs
• [x] Update "Syllabics kerning.md" file to reflect Syllabics kerning methodology and common scenarios (ᓇᑦ, ᒥᓄ, etc.)

General revisions across all files:

• [x] Revise titling hierarchy
• [x] Simplify and revise emphasis styles within text
• [x] Convert figures / charts image references to those files within the repo
• [x] Add any required relative links

[KevinKingFonts]

@KevinKingFonts