Add store credit plugin, cleanup junk

reflect/.gitignore

@@ -0,0 +1,14 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb

reflect/src/lib.rs

@@ -6,7 +6,7 @@ extern "ExtismHost" {
 }
 
 #[plugin_fn]
-pub unsafe fn reflect(input: String) -> FnResult<String> {
+pub fn reflect(input: String) -> FnResult<String> {
     let input = unsafe { host_reflect(input)? };
     Ok(input)
 }