THRIFT-2602: Fix missing dist files
Client: build process
Patch: jfarrell

Add check for php extension to not build if phpize has not been run,
update Vagrantfile to update package list for haskell test deps, and
change bison min version to 2.4 to work with the current versions of
debian, ubuntu and centos.
THRIFT-1609 Cocoa import namespace
Client: Cocoa
Patch: Xabier Eizmendi
THRIFT-2624: Add TServerEventHandler support to C#
Client: C#
Patch: ra

Adds the TServerEventHandler interface to the C# lib and adds
support in all C# servers.
THRIFT-2541 reclaim TFramedTransport's read and write buffers for thrift cpp
Client: C++
Patch: Huabin <4130944@qq.com>
THRIFT-2602 Fix missing dist files

- set bison to 2.5
- include "config.h" within thriftl.ll

Patch: Roger Meier
Merge branch 'master' into thrift_patch