account for table header height when splitting a table accross pages
bugfix - bug was introduced with latest refactoring
Back to the future
Update CHANGELOG
Failing spec for issue #20

Failing spec for issue #20

Failing spec for issue #20
Merge pull request #21 from floydj/master

Failing spec for issue #20
fixes #20 - empty rows may have resulted in an error
fixes #22 - unnecessary page break with centered tables
Merge pull request #25 from prawnpdf/hb_issue_20

fixes #20 - empty rows may have resulted in an error
Merge branch 'master' into hb_split_table_rows

Conflicts:
	lib/prawn/table.rb
Merge branch 'hb_issue_22' into hb_split_table_rows