enable automake version 1.14
Fix compiling on platforms lacking setenv

Using autotools, the availability of putenv is not checked, so
the macro HAVE_PUTENV is not defined and compiling stops with
the error "No environment-setting function has been defined."
Thus, also check for putenv.
Fix Qt5 decimal separator bug

Always use '.' as the decimal separator in the GUI, because we
call setlocale(LC_NUMERIC, "C") in setLocale() (GuiApplication.cpp).
Update it.po
Fix the fix to the decimal separator problem with Qt5
Japanese docs: translations and corrections from Koji
ja.po: translations for LyX 2.1 from Koji
Japanese UserGuide.lyx: update fileformat
ja/splash.lyx: default output is now dvipdfm(x)
trying to mimic CMake as used by Qt Creator
Merge branch 'master' of git://git.lyx.org/lyx

# By Enrico Forestieri (3) and others
# Via Scott Kostyshak
* 'master' of git://git.lyx.org/lyx:
  ja/splash.lyx: default output is now dvipdfm(x)
  Japanese UserGuide.lyx: update fileformat
  ja.po: translations for LyX 2.1 from Koji
  Japanese docs: translations and corrections from Koji
  Fix the fix to the decimal separator problem with Qt5
  Update it.po
  Fix Qt5 decimal separator bug
  Fix compiling on platforms lacking setenv
  enable automake version 1.14

Conflicts:
	.gitignore
	lib/doc/ja/UserGuide.lyx