THRIFT-2696 Unable to stop socket server while there are idle clients
Client: Delphi
Patch: Jens Geyer & Severian Duchenko
THRIFT-2704 - compiler: T_ONEWAY type used for oneway methods instead of T_CALL

Patch: Konrad Grochowski

This closes #216
THRIFT-2714 Graphviz generator is missing from MSVC++ project files
Client: Graphviz
Patch: Jens Geyer
libgenerate extracted from thrift executable so compiler specific unit tests can be added
compiler: IndentKeeper extracted from t_generator

* tests added for IndentKeeper
* t_generator movd a little bit towards meeting SRP
* IndentKeeper can be reused by lower level generator
     (like MethodGenerator)
compiler: IndentGuard added

will simplify operating on indents
compiler: ScopeGuard added
compiler: C++ generator refactoring started - operator<< generation made more 'clean'