(cbeta-parse-element): Add new arguments `robust' and

(cbeta-parse-element): Add new arguments `robust' and
`strict-component'; modify for `cbeta-parse-1'.
(cbeta-parse-component): Likewise.
(cbeta-parse-horizontal): Add new arguments `robust' and
`strict-component'; modify for `cbeta-parse-component'.
(cbeta-parse-vertical): Likewise.
(cbeta-parse-other): Likewise.
(cbeta-delete-char): Add new optional argument `strict-component'.
(cbeta-parse-substitution): Add new arguments `robust' and
`strict-component'; modify for `cbeta-parse-1'.
(cbeta-parse-elimination): Likewise; modify for `cbeta-delete-char'.
(cbeta-parse-1): Add new optional argument `robust' and
`strict-component'; modify for `cbeta-parse-element',
`cbeta-parse-horizontal', `cbeta-parse-vertical', `cbeta-parse-other',
`cbeta-parse-substitution' and `cbeta-parse-elimination'.