Update supported versions

Change from 1.6.2 to 1.6.4 in the first output line.
Add version 78 (1.6.4) to the list of supported versions.
Merge pull request #21 from justcool393/Indev

Add protocol version 78 (1.6.4) to the list of supported versions.
Fix Unhandled WebException

This commit fixes an unhandled WebException that may occur when
attempting to connect to the Minecraft session server when it is very
slow or unreachable.
Merge pull request #22 from justcool393/Indev

Fix Unhandled WebException
Merge pull request #23 from ORelio/Indev

Merge Indev to Master - MCC v1.6.2