Implements the record_mic feature as a post module

For easier deployment in the web GUI. Works for Windows meterpreter
and Java meterpreter.
Avoid saying "webcam", might be misleading.
Can be used against multiple platforms since it supports java
Merge branch 'post_mod_record_mic' of https://github.com/wchen-r7/metasploit-framework into wchen-r7-post_mod_record_mic