move ported cpp_shared resources

src/common/cpp_essentials/mod.rs

@@ -0,0 +1,22 @@
+pub mod bitmatrix_cursor;
+pub mod direction;
+pub mod dm_regression_line;
+pub mod edge_tracer;
+pub mod regression_line;
+pub mod step_result;
+pub mod util;
+pub mod value;
+pub mod concentric_finder;
+pub mod pattern;
+
+
+pub use bitmatrix_cursor::*;
+pub use direction::*;
+pub use dm_regression_line::*;
+pub use edge_tracer::*;
+pub use regression_line::*;
+pub use step_result::*;
+pub use util::*;
+pub use value::*;
+pub use concentric_finder::*;
+pub use pattern::*;