Add tests
Remove timezone attributes => only GMT
Update readme
Add lubridate dependency
Add forze_tz to POSIX conversion
Merge pull request #18 from SthlmR/issue-13-forze_tz

Issue 13 forze tz
Update tests
add yaml dependency
add yaml support
Merge pull request #22 from SthlmR/yaml

Implement yaml support
Merge branch 'issue-13'
Merge branch 'master' of https://github.com/SthlmR/Coldbir

Conflicts:
	DESCRIPTION
	R/0-constants.r
	inst/tests/tests.r
Update README.md
Merge branch 'master' into issue-11-read-all

* master:
  Update README.md
  add yaml support
  add yaml dependency
  Update tests
  Add forze_tz to POSIX conversion
  Add lubridate dependency
  Update readme
  Remove timezone attributes => only GMT
  Add tests