win32: fix missing libarchive dependencies

When packing the windows installer, the dependencies of libarchive
were missing.
win32: fix the search path using HKEYs in cmake

When using the instaler, the search path used for vle has to rely
default HKEY value.
cmake: fix the error message in gvle

the message was the same as in vle.
win32: fix the predefined variables for Boost

In SpawnWin, boost variables that ar used to find boost were
not defined as 8.3 path
win32: fix the test_package test

Setting the vle home using a boost::filsesytem::path requires to
format the path string with string() function.
cmake: library dirs in FindVLE and FindGVLE

the library dirs can be empty in the case, for example, of an install in /usr/
on linux using pkg-config. These empty variables should not lead to errors in configure
when using FIND_PACKAGE_HANDLE_STANDARD_ARGS.
cmake win32: fix FindVle and FindGVLE for 64 bits

The Hkeys have a different place in the registration base.
THe search path for vle and gvle is modified
cli: fix uncaught exception

an exception was uncaught in the CLI when creating a package
package: fix the extension detection of libraries

Using the macro G_OS_WINDOWS does not work, use instead
classical macros _WIN32, etc..
vle: build a static library libvle

To simplify the distribution of the R and PyVLE binary package, we need
to provide a static version of the libvle archive.
NEWS: add changes from vle-1.1.0-beta1