Log Message:
Update to 1.70:

Version 1.70 allows, on GTK+, approximate character set conversions for
pasting and uses internationalised input at all times.

Version 1.69 supports z-order based Ctrl+Tab buffer switching.

Version 1.68 can draw the caret line translucently, recognizes the
language from an initial #! line, and has an accurate TCL lexer.

Version 1.67 is faster on files with long lines, and has some bugs fixed.