Don't pretty print the values in the settings database.
The `fostlib::accessors` now use perfect forwarding if `FOST_HAS_MOVE` is defined.
Merge branch 'develop' of github.com:KayEss/fost-base into develop

Conflicts:
	ChangeLog
Allow `fostlib::future<>` instances to be compared for equality.
Update the observers more often.
The meta data set on the progress for a task is now made available to the meter readings.
Futures now return `const&`s instead of copies of the value when they're dereferenced.
There is a new `fostlib::cli::monitor` function.

It can be used to display a progress bar monitoring work towards a
future.
Fixed the progress bar tests.
We can't make use of C++11 features in this part of the code base.
Fix a problem where a temporary result was being returned.
Merge from develop
 ChangeLog                             | 14 -------------
 Cpp/fost-cli/progress-bar-tests.cpp   | 10 ++++-----
 Cpp/fost-cli/progress-bar.cpp         | 10 ---------
 Cpp/fost-core/meter.cpp               |  7 ++-----
 Cpp/fost-core/progress.cpp            |  8 +++----
 Cpp/fost-core/setting.cpp             |  3 +--
 Cpp/fost-core/thread.cpp              |  3 +--
 Cpp/include/fost/accessors.hpp        | 32 +++++-----------------------
 Cpp/include/fost/progress-bar-cli.hpp | 39 ++---------------------------------
 Cpp/include/fost/progress.hpp         |  8 +++----
 Cpp/include/fost/thread.hpp           | 31 +++++-----------------------
 11 files changed, 28 insertions(+), 137 deletions(-)