20220721a

NodeBase

• Create src/exe directory for launching executables.
• Move RecoveryThread to its own files.

CodeTools

• Checks removed from Editor and made before logging FunctionCouldBeFree were forgotten for DataCouldBeFree.
• Fix bugs when deleting C++ items.
• Automatically preserve warnings generated during compilation if >check is re-executed.

Other

• Update documents and add an installation guide.