wrangler1.2: Added symbolic evaluation and behaviour refactorings

Main changes since last release:

• Added "Symbolic evaluation" refactorings
• Added "Behaviour refactorings"
• Added "Backward intra-function slice" inspector
• Added support for $(DESTDIR) in Makefile
• Fixed typos, rewrited, added typespecs, and cleaned up some parts of the code
• Fixed problems:
  • With prettyprinter when patterns are empty but there is a guard
  • In "Add a WS operation" transformation
  • In "Remove a WS opertation argument" transformation
  • In "Swap Function Arguments" refactoring
  • In removal of functions from custom refactorings
  • In error message of API migration
  • In "Rename module" command output
  • With atoms that span multiple lines
  • With callback attribute
  • With maps
• Added check for lists in generalised unification
• Restored function api_refac:reset_pos_and_range/1
• Removed dependency on r17 eep

updated to work with R17

wrangler1.1.01

new function added.

wrangler1.1: Merge pull request #49 from dmitrii-zolotarev/master

I got the make error: src/refac_s_group.erl:3: can't find include lib "w...