pptemplate improvements

[HaraldJoerg]

As discussed on IRC:

• Minor bugfix: Requires 'PDL' instead of 'PDL::Basic'
• The script now creates MANIFEST, MANIFEST.SKIP and .gitigignore files for bookkeeping
• The script writes one line what it does
• POD is adapted to the new "deep" mode results

The second commit recommends pptemplate in the documentation of PDL::PP.

Further ideas:

• The error messages of pptemplate are rather dry. Using autodie would bring an improvement, but I know that many people are uncomfortable not checking the return code of open etc.
• I did a manual test which could be automated as an xt test:
  1 pptemplate PDL:Some:Module
  2 cd PDL-Some-Module
  3 git init
  4 git status > /tmp/before
  5 perl Makefile.PL
  6 make
  7 make distcheck # should pass, i.e. not mention MANIFEST
  8 make dist
  9 git status > /tmp/after
  10 git diff /tmp/before /tmp/after # must be empty

[coveralls]

coverage: 67.399%. remained the same
when pulling 29ceb49 on HaraldJoerg:pptemplate-files
into 146e9bb on PDLPorters:master.

[mohawk2]

Thank you, this is great! A couple of change are needed.