docs: update the readme slightly

README.md

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+# Vanessa
+
+Vanessa is a utility library for Rust programs.
+
+It provides an extremely easy logger and dead-simple threading.
+
+### Logging
+
+Logging is super simple, initialize it at the start of your program
+and you can use the various log level macros anywhere in your program!
+You can also create new loggers and log to them with the `s` macros
+(like `sinfo!` or `sdebug!`). Loggers have 7 levels here:
+
+- Hyper: Hyper is for really spammy debug messaging. The default logger
+and any logger from `Logger::quick` has the log level set too high
+for these.
+
+- Debug: Debug is for debug messaging (obviously). The default logger
+and any logger from `Logger::quick` will only show these when compiling
+in debug mode.
+
+- Info: Normal info messages.
+
+- Warn: Warnings.
+
+- Error: Errors.
+
+- Fatal: Critical errors, this is for full-program crashes or other
+similarly critical failures.
+
+- Input: This is a special log level used to get input from the user.
+Its macro returns an `Option<String>`.
+
+```rust
+use vanessa::{info,sinfo};
+
+fn main() {
+    // call this somewhere at the start of your program
+    vanessa::log::init();
+    // or just call vanessa::full_init() to init everything!
+
+    info!("Hello World!");
+
+    let logger2 = vanessa::log::Logger::quick("Another Logger");
+    sinfo!(logger2, "You can also log to specific loggers which can have their own log levels!");
+}
+```
+
+### Threading
+
+Concurrency is done via background workers. Call the init function
+at the start of your program and you can call the `bg` function from
+anywhere to run a closure in the background!
+
+```rust
+use vanessa::worker::bg;
+
+fn main() {
+    // call this somewhere at the start of your program
+    vanessa::worker::init();
+    // or just call vanessa::full_init() to init everything!
+    // you can also call vanessa::worker::init_with(usize)
+    // to initialize with a specified number of threads.
+
+    bg(||{
+        // background tasks!
+    });
+}
+```