[logstream] logstream app flow

- Added flows to dag for mysql, syslog, system info log
- Added sample stram site config, sample logstash config, sample ui, sample shell script for generating system info
- Added empty log score operator

Squashed commit of the following:

commit d21db53960eaa01251904583a09c7be0fde61d27
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Fri Oct 11 10:50:09 2013 -0700

    added sample stram site config

commit 8a94d9b2a9f7e861c642706798be0b2a302c4723
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Fri Oct 11 10:43:37 2013 -0700

    added basic ui for logstream

commit ffb9b20cbeae9cb4d26221f890e244bb5a590fc7
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Fri Oct 11 10:40:53 2013 -0700

    added shell script to generate system info - cpu, mem, disk

commit feb30141f755bede95ef12c012f52474575ddb0d
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Fri Oct 11 10:38:20 2013 -0700

    added sample logstash config for apache, mysql, syslog, system info logs

commit e31c4bb4712f93e0ac0fb52ba52d8d16698d87c0
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Fri Oct 11 10:27:04 2013 -0700

    added system info to dag, added new dimentions to apache

commit b3fca761242ad177a813757d4d079d399aa2c3dd
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Mon Oct 7 17:21:51 2013 -0700

    added syslog to the dag

commit 4da8661833f2357b448c66d73df5ecd85bc45cb2
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Thu Oct 3 17:07:43 2013 -0700

    added new operator for logs score

commit b16b124ac3f6e93e84a2d3ffbae7ed807fe1e4df
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Thu Oct 3 17:07:14 2013 -0700

    changes for mysql logs flow

commit bb10b3602df9880d515f4c36632014d4273a7b1c
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Tue Oct 1 19:22:02 2013 -0700

    added msql logs flow to the dag

commit 51d40bb86a78c45e153390e214946de5ad2c972c
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Tue Oct 1 17:16:25 2013 -0700

    updated reference to JsonByteArrayOperator

commit 2f84f9afdff86f99249bea59a0710c5d270bdc25
Merge: 8cf550e 34b7efd
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Tue Oct 1 17:14:13 2013 -0700

    Merge branch 'logstream' of https://github.com/DataTorrent/Malhar into logstream

commit 8cf550e3d47bf7d17a95ec1badbffe53670d3c46
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Tue Oct 1 17:13:47 2013 -0700

    added websocket output

commit 34b7efdb577ebebc6ff36f67834e9dc5e9f10598
Merge: ab73b6e 99ee65f
Author: Chetan Narsude <chetan@datatorrent.com>
Date:   Tue Oct 1 11:46:57 2013 -0700

    Merge branch 'ashwinchandrap-operatorChanges' into logstream

commit 99ee65ff0830e9e3d8875683c3e093e322fcde87
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Fri Sep 27 19:42:09 2013 -0700

    Added two output ports - outputMap, outputJsonObject

    Squashed commit of the following:

    commit eda9f3e68b972586f95d77290d318ad32df57903
    Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
    Date:   Fri Sep 27 19:14:18 2013 -0700

        fixed formatting, and added test for new outputport

    commit a1b97c15b19aeb7866dc0729fa5fec7ffcb68a3d
    Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
    Date:   Fri Sep 27 18:57:35 2013 -0700

        fixed extra lines

    commit d0daed93858fc9850acbd61be11849ef785a5845
    Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
    Date:   Fri Sep 27 18:48:57 2013 -0700

        added new output port, renamed class

    commit c06c60d9ddec9a51ffe93aecf8d528d14e4ae992
    Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
    Date:   Thu Sep 26 17:52:26 2013 -0700

        changed operator to emit map<String,Object> instead of casting value to String

commit 75be9a7ea121716d2f070d81cc5b120fa1615d72
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Thu Sep 26 19:15:06 2013 -0700

    added operator in the dag to convert json byte array to map

commit 5723de11e387541eec98ae39fd136644f6f616f0
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Thu Sep 26 19:13:58 2013 -0700

    changed getTuple to pass on the byte[] as it is