Update script that creates metadata file to handle tags.

Tags can now sit in a plain-text file which features a one
tag per line and `create_metascrp.sh` will take them all,
put them on one comma-delimited line and put them into the
`metascrp.txt` file that is then created for Scriptogram.
Refactored line in script for creating Scriptogram metadata.

Got rid of new `tagsraw` variable from last commit by
replacing couple of lines with code with a line from
[a StackOverflow answer](http://stackoverflow.com/a/26831072/1563507).
Started to integrate creation of metadata into `autoscrp.sh`
Made `autoscrp.sh` independent of `create_metascrp.sh`.
Removed now unnecessary `create_metascrp.sh`.
Tidied up comment and tabbing in `archive.sh`.
Changed `archive.sh` to echo dir and filename.

Previously archive showed the commit message as a result
of the Git command in the script. I've silenced this and
have it return the most useful bit of information in the
script: the new directory and filename for the archived
piece.
Updated README.md to reflect removal of file.

Now `create_metascrp.sh` has gone I updated the
README to reflect this.
Updated notes on usage at top of `autoscrp.sh`.
Modified `autoscrp.sh` so now pushes files from `archives` only.

Now that `archive.sh` should take precedence over `autoscrp.sh`
-- kind of like signing off before publishing -- I've modified
`autoscrp.sh` so it now looks specifically in the `archives`
folder for the relevant content.
Added new `publish.sh` file.

New file executes `archive.sh` first then `autoscrp.sh`.
Updated README.md to include new `publish.sh`.
Bumped version number in `README.md`.