Changed BUILD_NUMBER to CURATOR_BUILD_NUMBER

To avoid conflicts with existing env var in any setup env (e.g. Jenkins CI)
first go at updating index routing allocation
remove unused regex validation
Time unit off-by-one fix for #65

```
2014-04-15T11:20:10.209 INFO                  index_loop:291  Would have attempted deleting index logstash-2014.04.13 because it is 2 days, 0:00:00 older than the calculated cutoff.
2014-04-15T11:20:10.209 INFO                  index_loop:291  Would have attempted deleting index logstash-2014.04.14 because it is 1 day, 0:00:00 older than the calculated cutoff.
2014-04-15T11:20:10.209 INFO        find_expired_indices:209  logstash-2014.04.15 is 0:00:00 above the cutoff.
```
Merge pull request #66 from untergeek/time-off-by-one-patch

Time unit off-by-one fix for #65
Fix for broken test after #65
Merge pull request #67 from untergeek/show-indices

Fix for broken test after #65
Add simple functionality to show indices at the command-line (and a corresponding inner function).
Merge pull request #62 from nickethier/index_routing

Index Routing Allocation (Required Rule)
Merge branch 'master' into show-indices

* master:
  remove unused regex validation
  first go at updating index routing allocation
Merge pull request #68 from untergeek/master

Add get_indices function and cmd-line args
Merge pull request #60 from mohabusama/master

Fix for Issue #58 Added CURATOR_BUILD_NUMBER
Updated CHANGELOG to reflect changes.
Merge pull request #69 from untergeek/show-indices

Updated CHANGELOG to reflect changes.
More test case fixes for #65 (no more complaints from Jenkins!)
Merge pull request #70 from untergeek/do-snapshots

More test case fixes for #65 (no more complaints from Jenkins!)
Updates to CONTRIBUTORS and README.md (new functionality)
Merge pull request #71 from untergeek/doc_changes

Updates to CONTRIBUTORS and README.md (new functionality)
Update README.md with correct test command
Merge pull request #72 from sfritz/master

Update README.md with correct test command