Remove Name -> TermName implicit.

And simplify the name implicits.
Remove TermName -> String implicit.

These implicits were crutches going back to a much Stringier
time. Of course "with great type safety comes great verbosity"
and no doubt this could be cleaned up significantly further.
At least the underpinnings are consistent now - the only
implicits involving name should be String -> TypeName and
String -> TermName.
Don't return unimportables from importedSymbol.

Hardening against the symptom of SI-6745, which yielded:

   wat.scala:4: error: too many arguments for constructor Predef: ()object Predef
      def this() = this(0)
               ^
The fix for the underlying problem in that bug
has been targetted at branch 2.10.x.
SI-6769 Removes GenJVM backend

Get rid of GenJVM and everything that refers to it.
Also get rid of GenAndroid since it's dead code that refers to GenJVM.
Expunged the .net backend.

It lives on in a branch born from this commit's parent.
It's abrupt; no attempt is made to offer a "smooth transition"
for the serious msil userbase, population zero. If anyone feels
very strongly that such a transition is necessary, I will be
happy to talk you into feeling differently.
Merge pull request #1693 from paulp/name-implicit-removal

Name implicit removal
Merge pull request #1697 from retronym/ticket/6745-2

Don't return unimportables from importedSymbol.
Merge commit 'refs/pull/1717/head' into merge-msil-genjvm-delete

* commit 'refs/pull/1717/head':
  SI-6769 Removes GenJVM backend

Conflicts:
	src/compiler/scala/tools/nsc/backend/jvm/GenAndroid.scala
Merge commit 'refs/pull/1718/head' into merge-msil-genjvm-delete

* commit 'refs/pull/1718/head':
  Expunged the .net backend.

Conflicts:
	build.detach.xml
	build.examples.xml
	build.xml
	project/Build.scala
	src/compiler/scala/tools/ant/Scalac.scala
	src/compiler/scala/tools/nsc/Global.scala
	src/compiler/scala/tools/nsc/settings/StandardScalaSettings.scala
	src/compiler/scala/tools/nsc/symtab/clr/TypeParser.scala
	src/compiler/scala/tools/nsc/transform/Mixin.scala
	src/intellij/compiler.iml.SAMPLE
	tools/buildcp
Misc touchup after purging msil/fjbg/genjvm.
Surgery on MANIFEST.MF.

Apparently this thing depends on trailing spaces because
I can't change it in my trailing-space-stripping editor
without the build failing with this informative message:

  BUILD FAILED
  /scala/trunk/build.xml:1403: Existing manifest /scala/trunk/build/pack/META-INF/MANIFEST.MF is invalid

The whole diff between working and not working is whitespace:

--- i/META-INF/MANIFEST.MF
+++ w/META-INF/MANIFEST.MF
@@ -4,11 +4,11 @@ Bundle-Name: Scala Distribution
 Bundle-SymbolicName: org.scala-ide.scala.compiler;singleton:=true
 Bundle-Version: 2.10.0.alpha
 Eclipse-LazyStart: true
-Bundle-ClassPath:
+Bundle-ClassPath:
  .,
  bin,
  lib/jline.jar,
-Export-Package:
+Export-Package:
  scala.tools.nsc,
  scala.tools.nsc.ast,
  scala.tools.nsc.ast.parser,
@@ -45,7 +45,7 @@ Export-Package:
  scala.reflect.runtime,
  scala.reflect.internal.transform,
  scala.reflect.api,
-Require-Bundle:
+Require-Bundle:
  org.apache.ant,
  org.scala-ide.scala.library
-
+
Merge pull request #1724 from paulp/merge-msil-genjvm-delete

Merge msil and genjvm deletions.