Add the ability to install tarantool from local source tree

[locker]

As a developer, I don't use released Tarantool versions. Instead I compile Tarantool by myself from a source tree. It'd be nice if tt had the ability to a add pseudo Tarantool installation with an arbitrary name that would point to a local source tree (via symlink) so that when I recompiled it, tt run would run the new binary without re-installation. I imagine something like this:

tt install tarantool-dev --src ~/src/tarantool/build/debug
make -j16 -C ~/src/tarantool/build/debug
tt run tarantool-dev  # runs the binary compiled above

This should work both for CE and EE Tarantool repositories (they store compiled binaries in different sub-directories).

Related issue: #292