* src/support/docstring.[Ch]
(from_ascii): new conversion function
(from_utf8): new conversion function
(to_utf8): new conversion function
(operator==) new, compare docstring and ASCII C string
(operator!=) new, compare docstring and ASCII C string
* src/support/Makefile.am: add new file docstring.C
* development/scons/scons_manifest.py: ditto
* src/funcrequest.[Ch]
(argument): change name to argument_ and type to docstring,
add an accessor
(FuncRequest): Add two new constructors taking a docstring argument
* all other files: adjust to the FuncRequest changes above
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14861 a592a061-630c-0410-9148-cb99ea01b6c8