SocketMapReduce can send several tasks to server.
Merge branch 'master' of https://github.com/vladthelittleone/mapreduce

Conflicts:
	Map-Reduce/src/main/java/by/thelittleone/mapreduce/core/client/MapReducer.java
	Map-Reduce/src/main/java/by/thelittleone/mapreduce/core/client/api/Mappable.java
	Map-Reduce/src/main/java/by/thelittleone/mapreduce/core/client/api/Reducible.java
	Map-Reduce/src/main/java/by/thelittleone/mapreduce/core/client/socket/loader/FileAddressLoader.java
	Map-Reduce/src/main/java/by/thelittleone/mapreduce/core/client/socket/loader/IPAddressValidator.java
	Map-Reduce/src/main/java/by/thelittleone/mapreduce/core/client/socket/loader/ServerAddressLoader.java