IGV 2.0 and bugfixes

Added

• Description of Scout branching model in CONTRIBUTING doc
• Causatives in alphabetical order, display ACMG classification and filter by gene.
• Added 'external' to the list of analysis type options
• Adds functionality to display "Tissue type". Passed via load config.
• Update to IGV 2.

Fixed

• Fixed alignment visualization and vcf2cytosure availability for demo case samples
• Fixed 3 bugs affecting SV pages visualization
• Reintroduced the --version cli option
• Fixed variants query by panel (hpo panel + gene panel).
• Downloaded MT report contains excel files with individuals' display name
• Refactored code in parsing of config files.