Add memory operations to memory i/o wrappers

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Add load_module_from_memory API call

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update version number

Change version to 4.2 since we added a new API call.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>