Revert "Version for 1.7.2" (Removed mail functionality)

                         This reverts commit 2a2109ccf447441e67cd15452292f0aea73031d9.

                         Conflicts:
                         	.gitignore
                         	src/at/junction/transmission/Configuration.java
                         	src/at/junction/transmission/Transmission.java
                         	src/at/junction/transmission/TransmissionListener.java
                         	src/config.yml
                         	src/plugin.yml

                         Do not push until tested.