Merge branch 'dev'

* dev: (88 commits)
  added comments of copyright
  added license, copying, citation and readme files
  edited DOCs
  changed cycling indicator NOT to include self-cycling twice
  changed cycling indicator NOT to include self-cycling twice
  changed cycling indicator to include self-cycling twice
  corrected some indicators and the spreasheet
  changed definition of CIIy
  calculated all indicators
  structure for the xls for the indicators of the product-based structures (still need to calculate them)
  structure for the xls for the indicators of the aggregate structure (still need to calculate them)
  added value ranges for the indicators and added the IIy
  added subtitle about indicators for DOCs
  cleaned  DOCs
  added indirect and cyclic indicators in the DOCs
  change vars to run circos
  Circos: sorted the issue that the intersectoral inputs and outputs were inverted
  Calculated the wX_stacked vars for the two meta-structures of each product-based structure and finished added the circos code. Also cleaned some code.
  changed colours for cyclic-acyclic decomposition and cleaned the code
  added wX_stacked var for the two meta-structures
  ...
added website link to README.txt
Merge branch 'master' into dev

* master:
  added website link to README.txt