Improve Computer Algebra System, from Enrico Forestieri <forenr@tlc.unipr.it>

Improve Computer Algebra System, from Enrico Forestieri <forenr@tlc.unipr.it>

	* src/mathed/math_symbolinset.C
	(void MathSymbolInset::maxima):
	       - newer maxima versions use inf instead of INF
	       - add support for greek pi

	(void MathSymbolInset::mathematica):
	       - add support for \cdot

	* src/mathed/math_stringinset.h
	       - account for the const version of asStringInset()

	* src/mathed/math_extern.C
	(bool extractScript):
	       - added bool superscript to formal parameters in order
	         to only extract superscripts

	(MathArray::iterator extractArgument):
	       - leave out delimiters and a possible superscript
	         for function arguments

	(bool isKnownFunction):
	(bool extractFunctionName):
	       - recognize standard and user defined function names

	(void splitScripts):
	       - correctly split scripts as expected by other functions

	(MathAtom replaceDelims):
	       - ranamed as replaceParenDelims

	(bool testOpenBracket):
	(bool testCloseBracket):
	       - test for "[" and "]", respectively

	(MathAtom replaceBracketDelims):
	       - replace something delimited by "[" and "]" with a
	         proper DelimInset

	(void extractDelims):
	       - create a DelimInset for "[" and "]" delimiters, too

	(void extractFunctions):
	       - improved recognition of function names

	(bool testTermDelimiter):
	       - test for '+' or '-' as term delimiters

	(MathArray::iterator extractTerm):
	       - extract a "term", i.e., something delimited by '+' or '-'

	(bool testDiffItem):
	       - improved recognition of a "differential fraction"

	(void extractDiff):
	       - call splitScripts() on numerator and denominator of a
	         differential fraction before analyzing them

	(void extractLims):
	       - improved recognition of a limit function

	(void extractStructure):
	       - reorganized order of searches

	(MathArray pipeThroughMaxima):
	       - newer versions of maxima use simpsum instead of SIMPSUM

	(string fromMathematicaName):
	       - translates from mathematica names

	(MathArray pipeThroughMathematica):
	       - calls mathematica and collects its output

	(MathArray pipeThroughExtern):
	       - add support for mathematica

	* src/mathed/math_numberinset.C
	* src/mathed/math_numberinset.h
	(void MathNumberInset::mathematica):
	       - add support for mathematica

	* src/mathed/math_matrixinset.C
	* src/mathed/math_matrixinset.h
	(void MathMatrixInset::mathematica):
	       - add support for mathematica

	* src/mathed/math_diffinset.C
	* src/mathed/math_diffinset.h
	(void MathDiffInset::maxima):
	       - add support for maxima

	(void MathDiffInset::mathematica):
	       - mathematica uses "D" and not "Dt" for normal derivatives

	* src/mathed/math_liminset.C
	* src/mathed/math_liminset.h
	(void MathLimInset::maxima):
	       - add support for maxima

	(void MathLimInset::mathematica):
	       - mathematica uses "Limit" and not "Lim" for limits

	* src/mathed/math_exfuncinset.C
	(string asMathematicaName):
	       - added some more function names

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14865 a592a061-630c-0410-9148-cb99ea01b6c8