Added unit "molecule" for conversion with "mole".
Added "molecule".
Added unit amount so that "0 degC" equals "32 degF".
Merge commit '0f8741d97a61469cb1d462360654b766d88addef' into develop

Conflicts:
	lib/udunits2-common.xml
Added "Makefile.in" to ".gitignore".
Added "m4/" subdirectory.
Merge branch 'master' into develop
Removed bundled EXPAT package.
Corrected ISO Latin-1 encodings that got screwed-up somehow.
Corrected comment.
Initial CMakeLists attempt.
Changed copyright year.
Corrected copyright year.
Corrected copyright year.
Corrected copyright year.
Corrected copyright year.
Corrected copyright year.
Corrected copyright year.
Corrected copyright year.
Corrected copyright year.