Add Rule to check for ElseExpression
Prototyped nested scopes, however its not working with how the AST is structured
Move rules to new cleancode.xml ruleset, add BooleanArgumentFlag rule
[GH-68] Move nested scopes class, implement static access.
Fix two bugs in BooleanArgumentFlag and StaticAccess rules.
Merge pull request #70 from beberlei/OOD

[WIP] [GH-68] Implement Design Rules for SOLID/Object Calisthenics
Refs #71 - documentation about composer installation relaxed
Merge branch 'master' of github.com:phpmd/phpmd
Cleanup CleanCode PR ruleset