Initial check-in of mapper library.
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Fixing off-by-one error in blob reader.
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Added support for key_only scanning.

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Making status pages look better.
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Removed erroneous import.

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Initial checkin of the Java mapper
Add example code. Not hooked up to the build system yet.
Update status.js to support additional Java information.
Add example to build
Get example building
Add build file readme
More reasonable defaults and typo fix
Add debuglevel to the jar rule
Move debuglevel to javac
Clean up merge error
Add done callback for end of controller phase
DatastoreReader can do a key-only query without having full entity definition.
API for starting new mapper job.
File cleanup.
Pluggable context pools support.