Included instructions on how to compile LiveSplit

Fixes #69
Fixed typo in readme
Fixed the name of the Express edition in Readme
Increased the weight of current runs

For calculating the averages, the weight usually was 0.9, but this
decreases it to 0.8 for a better representation of your current average
performance.
added subsplits
Changed Subsplits
Merge branch 'master' into fast-json

Conflicts:
	.gitmodules