build: Replace sed by perl in update-copyright

* Makefile (update-copyright): Likewise.
build: Make git Ignore generated files

* .gitignore: Likewise.
maint: Remove deprecated module(...) call in Lua modules

* dietncl/filter/import.lua: Likewise.
* dietncl/filter/prenorm.lua: Likewise.
* dietncl/filter/region.lua: Likewise.
* dietncl/filter/transition.lua: Likewise.
* dietncl/init.lua: Likewise.
* dietncl/nclaux.lua: Likewise.
* dietncl/xmlsugar.lua: Likewise.
* tests/test-filter-import.lua: Likewise.
* tests/test-filter-prenorm.lua: Likewise.
* tests/test-filter-region.lua: Likewise.
* tests/test-filter-transition.lua: Likewise.
* tests/test-init-parse.lua: Likewise.
* tests/test-init-parsestring.lua: Likewise.
* tests/test-nclaux-gen-id.lua: Likewise.
* tests/test-nclaux-timetoseconds.lua: Likewise.
* tests/test-xmlsugar-attributes.lua: Likewise.
* tests/test-xmlsugar-children.lua: Likewise.
* tests/test-xmlsugar-clone.lua: Likewise.
* tests/test-xmlsugar-equal.lua: Likewise.
* tests/test-xmlsugar-eval.lua: Likewise.
* tests/test-xmlsugar-gmatch.lua: Likewise.
* tests/test-xmlsugar-insert.lua: Likewise.
* tests/test-xmlsugar-match.lua: Likewise.
* tests/test-xmlsugar-remove.lua: Likewise.
* tests/test-xmlsugar-replace.lua: Likewise.
* tests/test-xmlsugar-userdata.lua: Likewise.
Merge branch 'master' of https://github.com/gflima/dietncl