parsing error in mutable code) and adds an error check for conflicting
files in compile all operations (a LL file and a corresponding .java
file).
The following files were changed:
M lib/javalanglevels-base.jar
M src/edu/rice/cs/drjava/model/compiler/DefaultCompilerModel.java
M src/edu/rice/cs/drjava/model/compiler/CompilerErrorModel.java
M src/edu/rice/cs/drjava/ui/config/ConfigFrame.java