Fixed RPL thread not stopped before closing simulator
Fixed operators SAME and ISTRUE for lists, and all other operators are back to normal.
Fixed bug in root finder.
Added optional 32-bit attributes to variable names (for future CAS use).
Merge branch 'master' of ssh://git.code.sf.net/p/newrpl/sources
Changed Micron to use micro U+00B5 character
Fixed screen updating when fonts are changed.
Added support for escape sequences in strings.