Handle IOException in FileWriter
Add test for server FileWriter
Add mkdir command to parser
Merge branch 'dev' of github.com:jg/dfs into dev
Merge branch 'dev' into feature/7-downloading_file

Conflicts:
	src/main/java/parser/Parser.java
	src/main/java/parser/clicommand/ExecuteCommandVisitor.java
	src/main/java/parser/clicommand/ICliCommandVisitor.java
Added rules to .gitignore