Major rewrites, signalk support almost there

Font and forms refactored, but not working yet, will explore
Rusttype lifetime issues in seperate project

Cargo.toml

@@ -14,9 +14,12 @@ arrayref = "*"
 chrono = "*"
 chrono-tz = "*"
 euclid = "*"
+log = "*"
+log4rs = { version = "*", features = ["file", "yaml_format", "console_appender"] }
 xml-rs = "0.8"
 text_io = "0.1.8"
+serde = { version = "*", features = ["derive"] }
 serde_json = "*"
-rusttype = "0.8.3"
+rusttype = "0.9.2"
 tungstenite = "*"
 url = "*"