v0.32.0

Most relevant commits:

• compiler/lexer: handle backslash in Markdown context
• compiler/disassembler: return assembly code as []byte
• compiler/disassembler: disassemble the text in Text instructions
• templates: control max text length with the Disassemble method
• compiler: disassemble 'func ()' as 'func()' instead of 'func () ()'
• compiler,runtime: disassemble macros as 'Macro' instead of 'Func'
• compiler/parser: fix lang mismatch error also for already parsed files
• all: allow Markdown to extends HTML and HTML to show imported Markdown
• all: prefer 'format' to 'language'
• templates: escape '~' in Markdown
• templates: rename Vars method to UsedVars
• scriggo: move the methods of *MapPackage to MapPackage
• compiler/parser: fix returned error if a file does not exist
• compiler: fix checking of dependencies of *ast.Statements nodes