Fix issue 54 to handle the corner case when delimiter or end-of-line fall as the leading character of a new buffer
Merge pull request #55 from wli600/issue-54

Fix issue 54 to handle the corner case when delimiter or end-of-line fal...
Backport #54 fix for 2.4.4
Merge branch '2.4'

Conflicts:
	src/main/java/com/fasterxml/jackson/dataformat/csv/impl/TextBuffer.java