Log Message:
Update tex-standalone{,-doc} to 1.2

* Fixed build option
* Fixed quotes for auto-build feature of the package.
* Added "multido" option.
* Fixes/improvements for output convert filename for the 'multi'
  option.
* Changed \IfFileExists test for \if..tex macros to support 'htlatex'.
* Issue #12: Fixed info message for mode=buildnew if generated file is
  already newer than source file.
* Issue #8: Updated description of mode=buildnew to state that it
  doesn't work with XeLaTeX.