removes build/ucx from makefile default tip

ucx is now used as external library

removes span around line number

test header file now contains user-select:none property

Release of version 2.0

improves API and adds functions for strings Version 2.0

fixes ancient header macro

adds appropriate public API

highlighter can now handle files which do not end with a blank line

adds appendfile() function to main module + adds TODOs for source files which do not terminate with a blank line

(0) -10 tip