Added installation and build instructions; made shift size 1 to 25 no…

…t 1 to 26 in GUI; moved dictionary to be static in a source file and not read in from a text file each time it's needed

Cargo.toml

@@ -1,11 +1,14 @@
 [package]
-name = "caesar_cipher"
+name = "rust_caesar_cipher"
 version = "0.0.1"
-authors = ["Tom https://github.com/FeynmanTesla"]
+authors = ["Tom Hardern - https://github.com/FeynmanTesla"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 rand = "0.7.3"
-druid = { git = "https://github.com/linebender/druid.git" }
+druid = { git = "https://github.com/linebender/druid.git" }
+
+[profile.release]
+opt-level = 3

README.md

@@ -1,2 +1,7 @@
 # Rust-Caesar-Cipher
 A Rust program that encodes and decodes text according to Caesar ciphers via a GUI or CLI. It can automatically decode ciphertext whose shift size is unknown.
+
+# Installation and building
+It is a prerequisite to have Cargo installed. Install it with rustup (recommended) at https://www.rust-lang.org/tools/install.
+With Cargo installed, run "cargo build --release" from the root directory of the repository.
+The executable will then be built at target/release/rust_caesar_cipher (from the repository root).

src/front_end/mod.rs

@@ -46,7 +46,7 @@ fn ui_builder() -> impl Widget<state::AppState> {
     let shift_mode_row: Flex<state::AppState> = Flex::row().with_child(Flex::column().with_child(Flex::row().with_child(shift_mode_title_label).with_spacer(20.0)).with_child(Flex::row().with_child(shift_mode_value_label).with_child(change_shift_mode_button).with_spacer(20.0))).with_spacer(20.0);
 
     let shift_size_title_label: Label<state::AppState> = Label::new("Shift size:").with_text_size(20.0);
-    let shift_size_slider = Slider::new().with_range(1.0, 26.0).lens(state::AppState::shift_size);
+    let shift_size_slider = Slider::new().with_range(1.0, 25.0).lens(state::AppState::shift_size);
     let shift_size_value_label: Label<state::AppState> = Label::new(|state: &state::AppState, _env: &_| format!("{}", state.get_shift_size() as i64)).with_text_size(15.0);
     let shift_size_row: Flex<state::AppState> = Flex::row().with_child(Flex::column().with_child(Flex::row().with_child(shift_size_title_label).with_spacer(20.0)).with_child(Flex::row().with_child(shift_size_slider).with_child(shift_size_value_label).with_spacer(20.0))).with_spacer(20.0);