Rewrite README.md
Merge pull request #9 from lummax/readme_rewrite

Rewrite README.md
Set type of StringLiteral in ResolveVisitor
Implement String as corelib class
Implement (un)boxing of Strings
Test cases for String-constructor
Test cases for String as Object
Move CodeGenerator.initFormatStrings to Operations
Simplify Operations.print* using a helper function
Move Operations.initFormatStrings into print functions
Operations.print*: move formatstring init in printHelper()
Rename Print.monty to System.monty
Create System.println() declarations
Implement Operations.println()
Test cases for System.println()
malloc: Switch from i32 to i64
Implement Input-Redirection in Main.java
Implement reading from *.input in IntegrationTests
Create System.readln() declaration
Add readln_helper() in std_llvm_include.ll