Merge branch 'bw/ls-files-sans-the-index'

Code clean-up.

* bw/ls-files-sans-the-index:
ls-files: factor out tag calculation
ls-files: factor out debug info into a function
ls-files: convert show_files to take an index
ls-files: convert show_ce_entry to take an index
ls-files: convert prune_cache to take an index
ls-files: convert ce_excluded to take an index
ls-files: convert show_ru_info to take an index
ls-files: convert show_other_files to take an index
ls-files: convert show_killed_files to take an index
ls-files: convert write_eolinfo to take an index
ls-files: convert overlay_tree_on_cache to take an index
tree: convert read_tree to take an index parameter
convert: convert renormalize_buffer to take an index
convert: convert convert_to_git to take an index
convert: convert convert_to_git_filter_fd to take an index
convert: convert crlf_to_git to take an index
convert: convert get_cached_convert_stats_ascii to take an index

diff --cc apply.c
Simple merge

diff --cc blame.c
Simple merge

diff --cc builtin/commit.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc combine-diff.c
Simple merge

diff --cc diff.c
Simple merge

diff --cc dir.c
Simple merge

diff --cc merge-recursive.c
Simple merge