Make restarter ignore Emacs lock files

which are being created when user modifies some file.

Emacs creates symbolic link in same directory as modified file and
prepends ".#" to the file name.

So when user edits /some/path/Foo.pm Emacs creates /some/path/.#Foo.pm

http://www.gnu.org/software/emacs/manual/html_node/emacs/Interlocking.html
Merge pull request #398 from maio/emacs-lock-ignore

Make restarter ignore Emacs lock files
typo
fix warning from Plack::App::WrapCGI
Merge pull request #399 from frioux/patch-1

fix warning from Plack::App::WrapCGI
a bit more pod markup
use_logger option for HTTPExceptions middleware