Bugfixes

[ktrns]

This PR fixes several small bugs that came up recently.

Also, the changes

• Fixed #64
• Updated dotplot colouring
• New dotplots per cluster per sample
• Log10 colour scale for cluster QC feature plots
• Updated headers throughout the report
• Updated sample name for SmartSeq-2 test dataset

[ktrns]

I updated the scripts according to our discussions.