* bin/review-compile, lib/review/htmlbuilder.rb,
  lib/review/idgxmlbuilder.rb: unify block coding styles and regexp
  coding styles.
* bin/review-compile: accept multiple stylesheets.
  set default values for language and htmlext.
  use YAML file by passing --yaml=YAMLFILE option.
* lib/review/htmlbuilder.rb: support htmlext and language parameter.
  support multiple stylesheets.
* lib/epubmaker.rb: new EPUB support library. Not only ReVIEW can
  use this library. This library is experimental.
* bin/review-epubmaker-ng: experimental alternative implementation
  for review-epubmaker using epubmaker.rb. This tools is under
  construction and may be changed widely.
* doc/libepubmaker/sample.yaml: sample YAML file for epubmaker.rb
  library.
separate files.
call parent.
update changelog
fix a typo
* lib/epubmaker/epubv2.rb: fix indent.
* test/test_epubmaker.rb: initial test codes.
bin/review-compile: use "puts" according to write method
fix level handling of mytoc.
add @<bib> //bib to latexbuilder
fixed position of line break in //bibpaper
add dc:publisher in epub
Merge branch 'bib_to_latex' of https://github.com/authorNari/review into authorNari-bib_to_latex
merge Nari's branch.
workaround for inline icon support
add maxwidth for latex indepimage
Merge branch 'fixed_bugs' of https://github.com/authorNari/review into authorNari-fixed_bugs
merge nari's branch.
use compile_inline() to caption on //bibpaper
Merge branch 'fixed_bib_compile_inline' of https://github.com/authorNari/review into authorNari-fixed_bib_compile_inline
merge nari's branch. use compile_inline() to caption on //bibpaper