Merge pull request #1 from metamx/master

Update to latest master
ForkingTaskRunner: Fix pass-down of nodeType
remove DimensionSelectorFactory
Merge remote-tracking branch 'metamx/master'
Merge pull request #277 from metamx/column-selectors

Merge DimensionSelectorFactory into ColumnSelectorFactory
OmniGraffle file containing sources for various images.
Two new cluster overview graphics for Design.md
Merge branch 'master' of github.com:metamx/druid
Add documentation for extensions and modules to 0.6 version of Druid
Merge pull request #280 from cheddar/master

Write some docs for modularity and extensions
Update igalBranch to latest master
fix configuration conversion bugs and docs and hdfs configs
refactored some text and added images
Merge pull request #278 from metamx/igalDruid

Some new graphics
add tools pull-deps to cli
hack to support remote repository authentication
Merge pull request #285 from metamx/pull-deps-auth

Implement `tools pull-deps` and remote repository authentication
Update to Architecture intro file:
* Updated description of druid architecture components
* Added links from descriptions to actual component pages
* Removed Data-Flow page, which was a (mostly) redundant subset of other pages under Architecture)
* Moved non-redundant info from Data-Flow to other Architecture pages
* Updated info on how data actually flows in Druid 0.6
Merge pull request #287 from metamx/igalDruid

Update to Architecture intro file:
WorkerTaskMonitor: Add log message