Update powershell.rb
Do last code cleaning
Change module filename
Fix message
Land #3190, @Karmanovskii's module to fingerprint MyBB database
Fix description
Fix title
Add sqlite3 to Gemfile

Fixes all the post modules that require it to parse pilfered sqlite DB
files.
Clean code
Change module filename
Land #3115, @silascutler's module for elasticsearch indeces enumeration
Add module for CVE-2014-3120
Land #3395, sqlite3 gem for some post modules
Dress up CAPWAP DoS desc a little.
Rewire some snmp modules to use print_error instead of print_status.
Land #3399, print_error instead of print_status
Land #3398, CAPWAP DoS description cleanup
Adjust whitespace and set bytes to str for Python 2
Fix the last of the Set-Cookie msftidy warnings
Land #3400, last msftody set-cookie warnings