add drain script for elasticsearch /issue #51
settle on curl and subshells /issue #51
additional drain testing and cleanup /issue #51
subshells over backticks /issue #51
Add logstash_ingestor.syslog_tls settings
Adjust logstash.filters configuration and location of default, embedded filters.
By default, embedded filters are no longer included if you specify your own
filters. See example/warden.yml for a way to continue doing this.

 * issue logsearch/logsearch-boshrelease#58
Minor tweaks after additional testing of drain script.

 * issue #51
Merge pull request #59 from logsearch/add_syslog-tls

Add syslog_tls ingestor
Add Dockerfile
Make logstash filters configuration an embedded spec value. This is most useful
when using manifests with ERB templates (see examples/bosh-lite.yml)

Issue #60
Merge branch 'elasticsearch-drain' into develop

Conflicts:
	examples/bosh-lite.yml
Merge branch 'refactor-filters' into develop
Make filter configuration more dynamic (note the path is relative to the working directory).

Issue #60
Drop old, out of scope nginx type-casting filter.

Issue #62
Make syslog_tls support optional, enabled by the port property

Issue #63
Merge pull request #64 from logsearch/syslog-tls-optional

Make syslog_tls support optional, enabled by the port property
Release 16

This adds TLS support to the syslog ingestor and significantly changes how logstash filters are configured.

Backward Compatibility Break - the `logstash.filters` is no longer an array of files to extract and dynamically compose a set of filters. The value must now be the final concatenated form of the filters you want to use (excluding the wrapping `filter { ... }` parts). Typically you'll automatically update this from a build artifact.

 * BREAKING CHANGE: the `logstash.filters` property now expects a string of the literal filter rules logstash should use (#58)
 * ADD: syslog_tls ingestor support (#59)
 * ADD: drain script for elasticsearch - currently disabled, by default, with the `elasticsearch.drain` property (#51)
Improve README and create a logsearch-latest symlink release
Merge branch 'develop' of https://github.com/logsearch/logsearch-boshrelease