add list, show commands

The `list` command can be omitted and is the default. The `show` command
retains past output.

```console
$ anissue -h
Usage:
  anissue
  anissue list
  anissue show
```

The implementation uses docopts, the shell variant of docopt [1].
Because of that, wrapping with `--argv0 ''` is necessary when packaging.

[1] http://docopt.org/

1 files changed, 0 insertions, 32 deletions

diff --git a/src/extract.sh b/src/extract.sh
index 1e8440d..6422694 100755
--- a/src/extract.sh
+++ b/src/extract.sh
@@ -42,14 +42,6 @@
 #
 # @assigned kirchner@posteo.de
 
-# TODO Add command line modes list and show
-#
-# `anissue list` lists all issues in the current directory
-# `anissue show <issue>` shows an issue using it's id or automatically
-# assigned identifier
-#
-# @assigned aforemny
-
 # TODO Generate and show hash for each issue
 
 
@@ -115,28 +107,4 @@ git ls-files --cached --exclude-standard --other |
         "heading": $heading,
         "start_row": $start_row
       }'
-  done | while read -r item; do
-    created_at=$(echo "$item" | jq -r .created_at)
-    file=$(echo "$item" | jq -r .file)
-    heading=$(echo "$item" | jq -r .heading)
-    body=$(echo "$item" | jq -r .body)
-    start_row=$(echo "$item" | jq -r .start_row)
-    end_row=$(echo "$item" | jq -r .end_row)
-
-    GREEN='\033[0;32m'
-    BOLD=$(tput bold)
-    NORMAL=$(tput sgr0)
-    NC='\033[0m'
-    echo -e "$GREEN--- $created_at --- $file$NC"
-    echo
-    echo "$BOLD$heading$NORMAL" | fold -s
-    if test -n "$body"; then
-      echo
-      echo "$body" | fold -s
-      echo
-    fi
-    echo
-    cat "$file" | nl -w 4 -s "| " -p -d '' -b a| tail -n +$(($start_row - 2)) | head -n $(($end_row - $start_row + 7))
-    echo
-    echo
   done