New Ligatures:
    - colon_colon
    - exclam_exclam
    - semicolon_semicolon
    - less_less
    - greater_greater
    - hyphen_equal (minus_equal)
    - asterisk_equal
    - slash_equal
    - less_slash_greater
    - less_less_equal
    - quotedbl_quotedbl_quotedbl
    - quotesingle_quotesingle_quotesingle
New Powerline Glyhps:
    - E0A1 (Powerline LN)
    - E0A2 (Powerline lock)
    - E0B1 (Powerline left soft divider)
    - E0B3 (Powerline right soft divider)

Features:
    - ss10 can be used to substitute 'x' for '×'. Eg 0×FF or 800×600
    - 'Equality Spaces' and 'Less-than/Greater-than Horizontal Bar' alternatives are included
    by default, and can be activated via ss11 and ss12 respectively.
    - Corrected and simplified features code to include the missing 'kern' feature for
    fraction numerator and denominator positioning.
    - 'calt.js' will also generate the 'liga' feature.

Edited and repositioned some existing glyphs to be more consistent across font weights.
Created missing glyphs for other weights. Eg 'w_w_w.liga' and 'plus_equal.liga'