[irteus/irtmath.l] Add inverse matrix of complex matrix and eigen decompose considering complex number

[k-kimura]

・ 複素行列（要素に複素数をもつ行列）の逆行列の関数(inverse-matrix-complex)
・ 複素数の固有値も考慮した固有値分解の関数(eigen-decompose-complex)
を追加しました．

また，それをテストするサンプルプログラムを追加しています．

irteusgl$ (load "./irteus/test/mathtest.l")
TEST-NAME: mathtest
  now testing...
start testing [mathtest]
;; quaternion2matrix : invalid input #f(7.0 9.0 5.0 1.0), the norm is not 1
ALL RESULTS:
  TEST-NUM: 1
    PASSED:   1
    FAILURE:  0
RESULT: all-test
  TEST-NUM: 0
    PASSED:   0
    FAILURE:  0
RESULT: mathtest
  TEST-NUM: 1
    PASSED:   1
    FAILURE:  0
[ INFO] [1564215122.237826706]: cell* ROSEUS_EXIT(context*, int, cell**)

[k-okada]

ドキュメントも追加しましょう

[Affonso-Gui]

@k-okada Documentation has been merged at euslisp/EusLisp#393 , but we still don't have this functions. Is this getting merged soon?

[k-okada]

@Affonso-Gui @k-kimura merging euslisp/EusLisp#393 was my fault, you do not need to add jskeus document under euslisp repository.

[k-okada]

@k-kimura ドキュメントも追加しましょう

[k-okada]

Thank you for contributing jskeus documentation

Please check latest documents before merging

PDF version of Japanese jmanual: jmanual.pdf
HTML version of Japanese manual: jmanual.html
Sphinx (ReST) version of Japanese manual: jmanual.rst