Log Message:
Update to 0.1.2

* Update COMMENT.

Changelog:
libetonyek 0.1.2

- Use symbol visibility on Linux. The library only exports the two public
  functions now.
- Refactor the parser to allow sharing of code among Keynote, Pages and
  Numbers parsers.
- Add initial support for Pages (v. 4 only): text and text formatting,
  tables.
- Parse text language.
- Parse links.
- Fix parsing of tab stops.
- Add dependency on glm.
- Add initial support for Numbers (v. 2 only): sheets and cell content.
- Fix parsing of simple cell text content, which was ignored previously.
- Various small bugfixes and improvements.