Rename read/write to receive/send

src/main/jastadd/Errors.jrag

src/main/jastadd/MustacheNodes.relast

src/main/jastadd/Navigation.jrag

src/main/jastadd/RagConnect.relast

src/main/jastadd/backend/Generation.jadd

src/main/jastadd/backend/Mappings.jrag

src/main/jastadd/parser/RagConnect.parser

src/main/jastadd/scanner/Keywords.flex

src/main/java/org/jastadd/ragconnect/compiler/Compiler.java

...main/java/org/jastadd/ragconnect/compiler/SimpleMain.java

src/main/resources/ragconnect.mustache

src/main/resources/receiveDefinition.mustache

src/main/resources/sendDefinition.mustache