Create separate 'dist' module.

kiji-mapreduce/ module bundles its dependencies into a tarball
dist/ module creates the final "release" tarball
* includes KijiMR dependencies in lib/
* moves KijiMR jar to lib/distribution/hadoop2/
Compile the kiji-mapreduce module again, against hadoop 1.x, in a separate module.
fix pom dependency bug.
get DistributedCacheJars compiling in both.
Move hadoop 1.x build to a sane submodule name.
Add KijiMR Hadoop 1.x to dist/ module.
Remove unnecessary build profiles from kiji-mapreduce pom.

The hadoop1 pom profile is now in the kijimr-hadoop1x/ module.
Copy Hadoop WrappedMapper from Hadoop 2.0

We need the WrappedMapper.Context class from this, which doesn't
use any particular Hadoop 2.0 features.
Revert "Copy Hadoop WrappedMapper from Hadoop 2.0"

This reverts commit a2593237ac901f828c92758cd7e5369c5530b3a6.
This builds (and skips hadoop1)

Get correct artifacts deployed:
* existing kiji-mapreduce artifact renamed kiji-mapreduce-hadoop2
* moved kijimr-hadoop1x/ module to mr-hadoop1x/ (artifact: kiji-mapreduce-hadoop1)
* dist/ module artifact is kiji-mapreduce
** Attaches kiji-mapreduce-hadoop2.jar as kiji-mapreduce w/ hadoop2 classifier.
** Attaches kiji-mapreduce-hadoop1.jar as kiji-mapreduce w/ hadoop1 classifier.
** Depends on kiji-mapreduce-hadoop2.pom, so projects depending on kiji-mapreduce:jar
   include all our non-provided dependencies.
** Eliminated need for kiji-mapreduce[-hadoop2]:distribution:tar.gz
** Move jars into assembly with fileSets, not dependencySets to avoid passing
   transitive dependencies on both jars to our clients.
* Fixed checkstyle error in KijiMR introduced earlier in this process.
* Disabled hadoop1 build for now so this can build "green."

Tested with mvn clean install...
Then changed kiji-music to depend on kiji-mapreduce 1.0.0-rc61-SNAPSHOT.
* 'mvn clean verify' works
* 'mvn dependency:tree' shows correct inherited jars.