(maint) Correct uptime hour format string
Merge pull request #29 from peterhuene/maint/release

(maint) Set Release as the default build type.
Merge pull request #30 from adrienthebo/maint/master/uptime-resolver-format-string

(maint) Correct uptime hour format string
(maint) Move version information to the facter library.

Moving version.h to facter library so that it reflects the facter implementation version.
cfacter now calls into the facter library to determine the version rather than having the versionc compiled into two different executables.
Adding version to facter library name.
(maint) Fix where cfacter gets installed to.

Now that we don't build cfacter's dependencies, change back to installing cfacter to /usr/local/[bin|lib] by default.
(CFACT-20) Implement JSON output.

Implementing JSON output of facts.
Implementing map_value to support complex fact values.
Implementing integer_value to support integer types in JSON output.
Fixing output of existing integer types.
Normalizing fact names taken on the command line.
Merge pull request #27 from peterhuene/feature/json

(CFACT-20) Implement JSON output.
(maint) Add unit tests for util and execution.

Adding tests for:

- facter::util::file
- facter::util::option_set
- facter::util::posix::scoped_descriptor
- facter::util::posix::scoped_addrinfo
- facter::util::bsd::scoped_ifaddrs
- facter::execution::posix
(maint) Add test target to cmake output.

Adding a test target to cmake output so tests can be run with just "make test".
Updating travis to run tests through ctest.
Updating README to cover running tests.
(maint) Add unit tests for logging.

Adding unit tests for debug, info, warning, error, and fatal logging.
(maint) Add tests for array_value.

Adding unit tests for facter::facts::array_value.
(maint) Add tests for string_value.

Adding tests for facter::facts::string_value.
(maint) Add tests for integer_value.

Add additional unit tests for facter::facts::integer_value.
(maint) Add tests for map_value.

Adding unit tests for facter::facts::map_value.