math/sc-im: Update to 0.8.0

Packaging changes:
- Some patches got upstreamed
- Upstream now defaults to name=sc-im so it no longer needs to be set

Changes, (reformatted) from the official changelog:

New features:
- New motions in edit mode: df cf F dF cF d0 d$ c0 c$ t T dt dT ct cT ^
  g_ d^ dg_ c^ cg_
- Simple mouse support. Can handle selection of single cells and scroll.
- Added markdown export.
- Add custom colors with RGB definitions.
- Add support for italic attribute to be appled to cells.
- Added digraphs.
- Added EXECUTE command.
- Added --export_csv --export_tab --export_txt parameters.
- New input_bar_bottom config variable.
- New underline_grid config variable.
- Added filename in status bar (filename_with_mode config variable).
- Added option to truncate cells.
- Added xlsx sheet parameter.
- New @fact function.

Other:
- modified config and history file locations
- renamed winch to sig_winch.
- current fg and bg colors are kept if they are not specified in
:cellcolor.
- OpenBSD support (mostly wordexp() workaround)
- Correct lua api function names in doc
- always generate backup file when opening file
- renamed scim to sc-im in Makefile
- Document trigger return value convention

Issues fixed:
- fix bug when deleting an ent that for instance has a @sum()... it
  used to remove its vertex and THE ENTS LINKED to THEM!
- fix error messages when using "scim --version" and color definitions
  are intented to be applied from .scimrc.
- fix in waiting for valid command to complete after pressing ESC key.
- fix in parse_str so a word with white space can be stored in
  dictionary value
- fix when setting default_paste_from_clipboard_cmd
- Don't clobber startup message w/ err opening file
- Allow for lua scripts in local .sc directory #259
- Send informational messages to stderr rather than the output when
  used in non-interactive mode  #263
- fixed cell_negative color      #271
- fixed locked cells when saving #261
- fixed DEL key in insert mode  #272
- fix when resizing column      #266
- "Autobackup - case insensitive QER options when backup exists"
- fixed segfault when fcopy'ing with no selection while on first column
- Call write triggers on value clear
- Use sc_info to report trigger exit code
- fixed #277
- Grow table up to MAXROWS exactly
- Remove redundant if clause (God only knows where that was).
- fix in getVertex that prevented rebuild_graph to work properly.
- fix annoying bug because of not resetting inputline_pos to 0 when
  confirming a command in COMMAND_MODE
- fix in let and slet. existing vertexs should not be removed.
- added "eval_visited" in vertex struct for not to collide with
  current "visited", since:
    EvalAll uses EvalBottomUp
    EvalBottomUp uses EvalJustOneVertex
    EvalJustOneVertex uses eval
    eval uses GraphAddEdge
    GraphAddEdge uses GraphIsReachable
    GraphIsReachable uses visited
    and EvalBottomUp also uses uses visited!
- Also changed markAllVerticesNotVisited and
  All_vertexs_of_edges_visited functions.
- Some other issues fixed: #228, #234, #239, #240, #244, #246, #260,
  #295, #308
- .. and many other fixes and improvements!

Pending:
  The most significative issue is regarding circular references.
  This have to be deeply analyzed and with the collaboration of the
  community
  it would be hopefully fixed by v0.9.

(sjmulder)