Updates zlm-manri, build script, IME, and test page

[jackhumbert]

Manri Font Updates

• Swaps f/v glyphs (fixes fy and vy glyphs are swapped in zlm-manri #6)
• Fixes the index for smajibu (ZLM_DASH_*), allowing them to show up in FontForge
• Adds glyphs for tone markers
• Adds glyphs for smajibu
• Adds glyph for slakabu (it's blank and zero width)
• Adds glyph for stretch
• Changes non-ligatured diacritics to zero width, and adds anchors/lookup table so they're placed correctly with the mark lookup table
• Adds latin space character for spacing between words and smart line-breaks

Build Script / Font Feature File

• Separate script to build.pe for more advanced FF-specific actions
• Rename zlm.feature to zlm.fea - this is the standard extension for feature files
• Automatically generate src/zlm.fea when building
• Name the lookup tables in the feature so we can remove them before adding them (allows you to merge them and preview in FF)
• Adds lookup tables fixing the semivowel issues
• Adds full vowel support with slakabu exception
• Adds support for all symbols
• Adds exception for self-dotting vowels with slakabu

Font Examiner

• Cleans-up style and spacing a bit
• Adds more text and test cases based on previous issues
• Can be previewed here (has additional development fonts)

IME

• Updates the IBUS script/file to take advantage of all the fonts features (needs testing)
• Adds test/zbalermorna.js conversion function with support for all ZLM features
• Moves the IME emulation to test/ime.html with basic instructions
  • Can be previewed here (has additional development fonts)
• Adds ime/windows/zlm.klc source file for a Windows IME - see ime/windows/readme.md for details
  • The compiled Windows IME is available here as a .zip