Internal: remove IndexCloseListener & Store.OnCloseListener

Closes #9009
Test: added some logging to NodeEnvironmentTests.testDeleteSafe
Plugins: NPE when plugins dir is inaccessible

Steps to reproduce:

1. Download fresh es.
2. `sudo mkdir plugins && sudo chmod 0700 plugins`
3. Start elasticsearch

```
elasticsearch-1.4.1 λ ./bin/elasticsearch
[2014-12-09 12:18:59,025][INFO ][node                     ] [Piotr Rasputin] version[1.4.1], pid[16338], build[89d3241/2014-11-26T15:49:29Z]
[2014-12-09 12:18:59,025][INFO ][node                     ] [Piotr Rasputin] initializing ...
{1.4.1}: Initialization Failed ...
- NullPointerException[null]
```

Closes #8837.
Shutdown: Add support for Ctrl-Close event on Windows platforms to gracefully shutdown node

This commit adds the support for the Ctrl-Close event on Windows using native system calls. This way, it is possible to catch the Ctrl-Close event sent by a 'taskill /pid' command (or when the user closes the console window where elasticsearch.bat was started) and gracefully close the node. Before this commit, the node was simply killed on taskkill/window closing.
Mappings: Reencode transformed result with same xcontent

When I originally wrote the transform feature I didn't think that the
XContentType of the reencoded source mattered.  It actually matters because
payloads for the completion suggester are stored and returned exactly
as encoded by this XContentType.

This revision changes the transform feature from always reencoding with smile
to always reencoding with the provided XContentType to support the completion
suggester.

Closes #8959
Mappings: Include currentFieldName into ObjectMapper errors

Without currentFieldName error is very generic and non informative

Close #9020
Aggregations: Adds methods to get to/from as Strings for Range Aggs

Adds getToAsString and getFromAsString to Range interface and implements them for all range aggregations

Closes #9003
[Docs] Improve documentation of the new caching policy for filters.
[GEO] Add optional left/right parameter to GeoJSON

This feature adds an optional orientation parameter to the GeoJSON document and geo_shape mapping enabling users to explicitly define how they want Elasticsearch to interpret vertex ordering.  The default uses the right-hand rule (counterclockwise for outer ring, clockwise for inner ring) complying with OGC Simple Feature Access standards. The parameter can be explicitly specified for an entire index using the geo_shape mapping by adding "orientation":{"left"|"right"|"cw"|"ccw"|"clockwise"|"counterclockwise"} and/or overridden on each insert by adding the same parameter to the GeoJSON document.

closes #8764
[GEO] Removing unnecessary orientation enumerators

PR #8978 included 4 unnecessary enumeration values ('cw', 'clockwise', 'ccw', 'counterclockwise'). Since the ShapeBuilder.parse method handles these as strings and maps them to LEFT and RIGHT enumerators, respectively, their enumeration counterpart is unnecessary. This minor change adds 4 static convenience variables (COUNTER_CLOCKWISE, CLOCKWISE, CCW, CW) for purposes of the API and removes the unnecessary values from the Orientation Enum.

closes #9035
ShadowEngine
Don't support .flush() in shadow engine
Pass ShardRouting through Engine.start() method
Detect whether a shard is a primary when creating Engine