Fixed new java path code

 * When opening advanced option, show error screen only once
 * Empty path is not error. Launcher will use default JVM
 * Set initial color to red if file not found
Merge pull request #704 from jikuja/fix_advanced_options

Fixed new java path code
Merge pull request #705 from Viper-7/master

FIXED: Derp
Added: link's to java 7 download's for users with java 6 & java 8 mac users(MC will not run on java 8 on osx)
CHANGED: Store map, mod pack and texture pack archives in Local appdata instead of Roaming on Windows