Refactor a bunch of file stuff to be shorter and cleaner.

lib/flags.cc

@@ -36,6 +36,12 @@ FlagGroup::FlagGroup()
     currentFlagGroup = this;
 }
 
+FlagGroup::FlagGroup(std::initializer_list<FlagGroup*> groups):
+	_groups(groups)
+{
+    currentFlagGroup = this;
+}
+
 void FlagGroup::addFlag(Flag* flag)
 {
     _flags.push_back(flag);

lib/flags.h

@@ -7,10 +7,9 @@ class ConfigProto;
 
 class FlagGroup
 {
-private:
-    FlagGroup(const FlagGroup& group);
 public:
     FlagGroup();
+    FlagGroup(std::initializer_list<FlagGroup*> groups);
 
 public:
     void parseFlags(int argc, const char* argv[],