updated for version 7.4.275
Problem:    When changing the type of a sign that hasn't been placed ther is
	    no error message.
Solution:   Add an error message. (Christian Brabandt)
Added tag v7-4-275 for changeset 8a3117a4887c
updated for version 7.4.276
Problem:    The fish shell is not supported.
Solution:   Use begin/end instead of () for fish. (Andy Russell)
Added tag v7-4-276 for changeset a6b59ee633a3