fix "warning: control may reach end of non-void function" in assignment operator
switch to C++14
fix non-constant-expression cannot be narrowed from type 'int' to 'uint32_t
change datetypes of _width & _head from uint16_t to int32_t (avoiding same blooper as SDL did with 1.x ;)
fix datatypes propery (?)
_width & _height should be unsigned %"¤
fix argument format warning
some C++11 migration
return const reference rather than copies of strings for getter functions
use C++11 noexcept
make static inline functions const
refactorize and optimize for C++11
use nullptr (C++11)
fixup most of LOG messages and include function name as part of all log messages from now
use nullptr
silence warnings about unused variables
drop uncomputed value
- use auto types - silence warnings about unused variables
fix missing ';'
reference, not copy string