Merge pull request #126 from Atheros1/master

Fast bootstrap
Merge pull request #127 from Atheros1/master

store pubkeys in inventory longer
Merge pull request #128 from Atheros1/master

preparation for switch from 32 bit time to 64 bit time in protocol
Merge pull request #129 from Atheros1/master

Debian packaging
Add gitignore file
don't use pubkeys table to send pubkeys to peers now that we maintain them in the inventory table for 28 days anyway
Display privacy warning when Broadcast is selected on Send tab
Merge pull request #130 from lkarsten/add_gitignore

Add gitignore file
Merge branch 'master' of github.com:Bitmessage/PyBitmessage
add .dat files to .gitignore
First bit of code necessary for version 3 addresses