Java properties for Rust

This is a library for reading and writing Java properties files in Rust. The specification is taken from the Properties documentation. Where the documentation is ambiguous or incomplete, behavior is based on the behavior of java.util.Properties.

Example

```rust use javaproperties::PropertiesIter; use javaproperties::PropertiesWriter; use std::collections::HashMap; use std::env::temp_dir; use std::fs::File; use std::io::BufReader; use std::io::BufWriter; use std::io::prelude::*;

let mut filename = tempdir(); file_name.push("java-properties-test.properties");

// Writing let mut map1 = HashMap::new(); map1.insert("a".tostring(), "b".tostring()); let mut f = try!(File::create(&file_name)); let mut writer = PropertiesWriter::new(BufWriter::new(f)); for (k, v) in map1.iter() { try!(writer.write(&k, &v)); } writer.flush();

// Reading let mut f = try!(File::open(&filename)); let mut map2 = HashMap::new(); try!(PropertiesIter::new(BufReader::new(f)).readinto(|k, v| { map2.insert(k, v); })); assert_eq!(map1, map2); ```