Change lyx2lyx conversion and LaTeX export of documents with

Change lyx2lyx conversion and LaTeX export of documents with
\inputencoding default

	* src/paragraph_pimpl.C
	(isEncoding): Explain why bparams.inputenc == "default" is ignored

	* src/bufferparams.C
	(BufferParams::encoding): Determine the encoding from the language
	for inputenc == "default"

	* src/buffer.h
	(writeLaTeXSource): Mention inputenc == "default" in documentation

	* src/bufferparams.h
	(inputenc): Update documentation of "default"

	* src/output_latex.C
	(switchEncoding): Switch the encoding also for inputenc == "default",
	but don't output \inputencoding commands in that case

	* lib/lyx2lyx/LyX.py
	(get_encoding): Determine the encoding from the language for
	inputencoding == "default"

	* lib/lyx2lyx/lyx_1_5.py
	(convert_multiencoding): ditto

	* development/FORMAT: Update documentation of \inputencoding default

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16667 a592a061-630c-0410-9148-cb99ea01b6c8