Remove scaladoc warnings

Fix ambiguity of overloads and any broken links.

Scaladoc is notorious finicky when it comes to links, this stackoverflow answer may help:

• Everything must be fully qualified, even the class/object itself
• Package dots should be escaped with \
• You cannot use any spaces in the signature
• Parameters should include the name not just the type i.e. foo(a:String) not foo(String)
• The signature should end with a *