Features/many optimizations

[LuckyScamper]

• Textureregionatlas.load will no longer throw an exception, but merely look if the file follows a XML tag route and then goes along with that. Improves performance and the if-statement works in our use case.
• Combobox: removes thrown exception if the widget turns out to be null. Mostly happens in Myrapad
• Localization now works in Myra; one needs to set Project.Localize with a lambda/function to determine how to localize in their project, and use L18nTextKey in xmmp to determine the key.
• MMLDiagnosticAction (Credit goes to techpizza) handles errors and tells the user where issues start happening.
• Newer version of Framework.Portable in use
• ColorHSV now uses equals/gethashcode (mostly auto-generated) because C# prefers it that way when you use != and == operators. It also improves performance slightly

[realvictorprm]

cool stuff :)