Initial pass at travis config file.

Trying to install jekyll dependencies and run a jekyll build.
Using source directive for travis in jekyll config.
Setting UTF-8 US encoding in travis environment.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
Adding IRC notifications from Travis-CI.
Excluding /vendor in jekyll config.

Works around a build bug in Travis (hopefully).
Updated the exclude in jekyll config.

It must be in array format.
Merge pull request #7 from rhyolight/add-travis

Initial pass at travis config file.
NuPIC Doxygen automated doc build.
Added contributor
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.
NuPIC Doxygen automated doc build.