v0.6.0

*Added new freeze feature (including new :freeze and :unfreeze commands).
*Scripting support with LUA. Also with triggers and c dynamic linked modules.
*Added new :trigger and :untrigger commands.
*Insert mode history
*Added xlsx file export
*Added new :unformat command
*Added new ignorecase configuration variable for string searches.
*Double quotes can now be entered in SCIM backquoting them.
*Change in exponential and unary - priority: Exponentials bind higher than unary -.
*Change in how data coming from pipeline or redirection is processed.
*let and slet functions now handle undo/redo.
so that if you set a content with let or slet over script, you can also undo it.
*Group cols and rows when saving hidden columns and rows to file
*Added :wq command.
*Added SHIFT command in parser.
*sk and sh shift commands now saves in undo struct cells that depends on the range shifted.
*Keep default background or fg color of terminal
*Handle ESC key in EDIT and INSERT modes. Now it goes back to previous mode, instead of always returning to NORMAL MODE.
*UI isolation. Added dumb ui example.
*undo / redo are now ignored by the dot command.
*Fix in :sort command when a range is selected and not specified within the command.
*Fix in goto command. Removed unneeded free that made SCIM crash, and another crash when no result was found in search.
*Fix in '!' command. Did not work properly when using a white space after the '!'.
*Fix when saving cellcolors, locked cells and pad ranges in sc files. Sometimes colors and locked ranges did not get saved (most right column).
*Fix in history. Last element typed could get written twice in history.
*Fix crash with 'c' command after dc, dr, or shift command affecting cell A0.
*Now scim print columns to latest col in COLS, maximizing the grid view.
*Fixed crash because of syntax error when entering ". as text value. This also happened in sc.
*Fix when entering a number and then a centered text in the same cell. This also happened in sc. Text appeared a column to the right and aligned left.
*Fixed setfunc when saving sc file.
*Fix in deleterow
*Fix in shift functions
*Fix a memory leak in undo.c
*Fix/mods in undo/redo
*Fix in csv import
*Cleaned deletecol
*Fix in csv import: maxcol was not updated correctly during import.
*Fix when saving csv files with :w. before it saved a csv file with sc format.