hg: kulla/dev/langtools: Forward reference of methods, variables, and classes from methods implemented.

[robert.field at oracle.com]

Changeset: 75913598bf9d
Author:    rfield
Date:      2015-02-04 14:01 -0800
URL:       http://hg.openjdk.java.net/kulla/dev/langtools/rev/75913598bf9d

Forward reference of methods, variables, and classes from methods implemented.
Dependency tracker implemented.  KISS -- false postives possible.
Dependency mapper with lazy removal.
Redefine/Replace crawl implemented: Changed definitions propagate to referenced definitions.
New method on Snippet - otherCorralledErrors(): Used when already declared Snippet develops errors other then unresolved.
Support in Repl tool for new information.

! repl/TODO
! repl/src/api/EvaluationState.java
! repl/src/impl/EvaluationStateImpl.java
! repl/src/impl/SnippetImpl.java
! repl/src/impl/SnippetMaps.java
! repl/src/impl/SnippetSource.java
+ repl/src/impl/TreeDependencyScanner.java
! repl/src/tool/Repl.java