Added changelog for version 2.5.0.

Added changelog for version 2.4.1.

Added changelog for version 2.4.0.

Fixed CrashPlan download URL.

Add link for the new log directory used by CrashPlan.

Added changelog for version 2.3.8.

Added changelog for version 2.3.7.

Added changelog for version 2.3.6.

Added changelog for version 2.3.5.

Added changelog for version 2.3.4.