Revert "Add support for kwargs in function calls"

This reverts commit b776c6d42177c09e29fb191a2803300a79922608.
Merge branch 'f_drawminmax'

* f_drawminmax:
  Take the aggregation method of whisper just for min or max
  Function to draw an area with the min and max
  Doc and improvement for exacerbate function
  Patch for empty series
  Function that exacerbate the extrema of a graph
  Patch for 'normalize' that crashed with empty set
  Use the consolidate function for min or max series

Conflicts:
	webapp/graphite/render/evaluator.py
Merge branch 'f_misc1'

* f_misc1:
  Patch for the constantLine function
  Error with different format of "from" and "until"
Merge branch 'f_callback'

* f_callback:
  Use of function sort instead of sorted
  Add a function "callbackToNode"