#KT-1795 Fixed - added hashMap() and sortedMap() helper functions for creating maps more easily using tuples

added a hacky work around until KT-1524 is resolved so we don't have any bad wiki links in the api docs

kdoc now has working interactive search of classes, functions, properties e.g. "map()" or "fun map" or "class Foo" etc

 #KT-1754 fixed

kdoc improvements: added discovery of ReadMe.md or ReadMe.html files in a package source directory, so we can auto-discover documentation like this https://github.com/JetBrains/kotlin/blob/master/libraries/stdlib/src/kotlin/ReadMe.md and fixed a regression where we could not find the KPackage of a descriptor with changes to the AST and fixed up some bad links to external classes

kdoc improvements: added discovery of ReadMe.md or ReadMe.html files in a package source directory, so we can auto-discover documentation like this https://github.com/JetBrains/kotlin/blob/master/libraries/stdlib/src/kotlin/ReadMe.md and fixed a regression where we could not find the KPackage of a descriptor with changes to the AST

Show the source code link when you hover over the members to simplify and declutter the normal doc navigation.

Show the source code link when you hover over the members to simplify and declutter the normal doc navigation.

allow kdoc package summaries to use markdown for formatting and links (which works nicely in a pom.xml if using maven for example and avoids HTML escaping issues)

kdoc improvements: allow package summaries, package API doc URLs and documentation files to be specified so we can better describe package, reuse documentation for them or link to external packages. #KT-1463 Fixed

 It's important to be aware of what stream the messages will be written to, so such a default implementation is harmful

We used to have a triple (errorStream, messageRenderer, verbose) to represent the error reporting strategy.
 Now we have a single MessageCollector abstraction for this.
 As the MessageCollector abstraction was extracted, the need to CompilerMessageLocation and CompilerMessageSeverity arose, too.

Got rid of CompileSession class: this class shouldn't have had any objects, now it is transformed into KotlinToJVMBytecodeCompiler

(JetJavaMirrorMaker still can be returned by PsiPackage.getClasses())

#KT-1771 fixed

 #KT-1645 fixed