Changes to en-ueb-chardefs.cti and en-ueb-g2.ctb

- en-ueb-chardefs.cti: U+2019 (right single quote) between letters should
  be treated as apostrophe
- en-ueb-g2.ctb: Add U+2015 (horizontal bar) as a sequence delimiter;
  add variant of where'er with U+2019

Added a selection of test cases for U+2019 instead of apostrophe.
3 files changed