Add JSON parser library.

Code is v1.0.0 unmodified from [1] distributed under BSD 2-Clause license.
Code changes are hosted at [2].

[1] https://github.com/udp/json-parser
[2] https://github.com/cooperative-computing-lab/json-parser
Add sqlite3 v3.8.2 amalgamated library
Add helper library for dealing with file descriptors.
Add Chirp Job interface.
Cleanup Chirp children.
alphabetize/organize makeflow headers
Chirp batch job module and some reengineering.

This commit reengineers batch job to better support modules.  A bare-minimum
file system layer is added to allow files to be off the local file system.
Correct wrong format qualifiers.
Conditionally include Linux-specific sched.h code.
Copyright boilerplate.
Move sqlite3 to Chirp.

This addresses concerns that programs linking to dttools would have name
collisions.
Remove experimental limiting of processor cores in a job.
Remove unneeded headers.
Add documentation on the using batch_fs_* API.
Support HDFS access for -T hadoop.

Previously Makeflow had to run on FUSE+HDFS to access files.

Here's an example:

env HDFS_ROOT_DIR=/hdfs/host:port/path/to/working-dir HADOOP_USER_TMP=/a/tmp/path/in/hadoop HADOOP_PARROT_PATH=/path/to/parrot_run makeflow -T hadoop --working-dir=hdfs://host:port/path/to/working-dir Makeflow

HDFS_ROOT_DIR is used as the sandbox by Parrot before running the job (it is passed as --work-dir to Parrot).
HADOOP_USER_TMP is just a directory in Hadoop where job status information is stored.
HADOOP_PARROT_PATH is the Parrot executable you want to use.
LOCAL Hadoop jobs must also be run on the remote_queue.
job_commit, job_kill, job_status now take an array of job ids.
Make the options for debug file and output file consistent with rest of CCTools.
Fix AllPairs tests to use the new option for output file.
Clean up WQ stats:
1. add new information on tasks (cancelled), workers (joined, idle), reported
resources (bandwidth, memory, etc) to WQ stats.
2. reorganize and group related fields in stats structure.
3. reorganize the format of the log so related fields are grouped together.
4. remove the printing of deprecated fields in the log.