initial lab 01

useful.md

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+Open book of rust
+`rustup doc --book`
+
+Open std crate docs page
+`rustup doc std`
+
+Open vec in std crate docs page
+`rustup doc std::vec`
+
+Compile
+`rustc <filename>.rs`
+
+Create package
+`cargo new 01`
+
+Search cargo crates
+`cargo search`
+
+Add crate
+`cargo add {crate}`
+
+Build/run
+`cargo build`
+`cargo run`
+
+Setup
+```
+cargo new lectures/01 --name lec01
+cargo new lectures/02 --name lec02
+cargo new lectures/03 --name lec03
+
+cargo new labs/01 --name lab01
+cargo new labs/02 --name lab02
+```