Extracting Command interface to ease extensibility
Merge remote-tracking branch 'origin/master' into extract-commands

Conflicts:
	src/main/java/com/sematext/solr/redis/RedisQParser.java
	src/main/java/com/sematext/solr/redis/RedisQParserPlugin.java
	src/test/java/com/sematext/solr/redis/TestRedisQParser.java
Merge pull request #7 from lstrojny/extract-commands

Extracting Command interface to ease extensibility