Initial pass through CPPCheck

Encouragingly not too many changes to be made. Locally built CPPCheck
with QT GUI. Will look at adding to Travis/AppVeyor build at some point.
Pointing Travis to my account
Initial AppVeyor Yaml file
Fixes to Yml matrix
More Yml massage
Updates to AppVeyor YAML, zconf.h and CMakeList
Now GCC and MSVC in the matrix
AppVeyor format fix
Addition of external libraries
Revert mistakes made in CPPCheck commit
More YAML fun
A new badge for the Readme.md
Trying the full nupic_core solution
Setting up external libraries
Build fix with apr header
Adding lib yaml
One final library error to squash

__environ...
Environ change
Additions to CMakeLists
Build fix