* doc/guide.tex: Improved the documentation of Binary

* doc/guide.tex: Improved the documentation of Binary
installer. Updated the requirements, specifically: Erlang R10B-9
is required as minimum, and R12 is not yet supported. Added
section Upgrading ejabberd. Improved documentation about Erlang
runtime system environment variables and command-line parameters.
* doc/guide.html: Likewise

* doc/release_notes_2.0.0.txt: Updated to RC1
* doc/version.tex: Likewise
* src/ejabberd.hrl: Likewise

* doc/introduction.tex: Updated to 22 languages

* doc/Makefile: Ensure that Bash is used

SVN Revision: 1154