This commit moves around most files. The new directory structure is as
follows:
* `lib/$LIBRARY/`: contains a library, i.e., a set of `.cpp` files used
by multiple libraries/tools.
* `include/revng/$LIBRARY/`: contains the public headers associated to
the library in `lib/$LIBRARY/`.
* `tools/$TOOL/`: directory where all the `.cpp` files (and private
headers) for a tool reside. Currently we have two tools: `revamb` and
`revamb-dump`.
On top of this, all file names are now in camel case.
Certain non-`static` functions were missing prototype declarations,
triggering a compiler warning.
This was due to a missing header or due to a bug in boost.
This commit resolves this situation.
Sometimes, dealing with move-semantics in C++ can be challenging. To
mitigate this problem, this commit introduces `ClassSentinel`, a simple
class that can be added as a member of a class and that will allow the
user to easily monitor if an instance of a class is used after being
moved in an unwanted way. To do so, simply call the
`ClassSentinel::check` method on the class member.
`ClassSentinel` performs similar (but less reliable) checks on usage of
destroyed objects.
`ClassSentinel` can also (optionally, though the `SENTINEL_STACKTRACES`
macro) collect stack traces of the points where the object was moved or
destroyed.
This commit also includes some basic testing for the class.
Alessandro Di Federico