Add missing #include statements

Hi
This fixes build errors due to missing #include statements.

Errors:
``
grandmaster.cpp: In member function ‘void GrandMaster::setValue(uchar)’:
grandmaster.cpp:146: error: ‘UCHAR_MAX’ was not declared in this scope
``
and
``
audio/audiocapture.h:107: error: ISO C++ forbids declaration of ‘int16_t’ with no type
audio/audiocapture.h:107: error: expected ‘;’ before ‘*’ token
``

Environment: GCC 4.4.7 20120313 (Red Hat 4.4.7-4), Qt 4.6.2-26.el6_4