many small changes to templater.
get string code to parse escapes. uses eval now, should parse strings
itself soon.
let caller check if fragment is defined using "in".
make templatepath take optional file name.
adding foo
adding bomb
adding a.c
adding dir/a.o
adding dir/b.o
! a.c
! dir/a.o
! dir/b.o
? .hgignore
a.c: unsupported file type (type is fifo)
! a.c