Removed KEduVocConjugation::getType()

Removed KEduVocConjugation::getType()
Instead, directly use KEduVocConjugation::tenses() to get a list of tenses (that correspond to conjugations).
Cleanup.
KEduVocKvtmlCompability::oldTense() to enable writing of old tenses. Still to do: the user defined tenses are not written correctly I assume.
Rename type to tense in VerbQueryDlg.

svn path=/trunk/KDE/kdeedu/libkdeedu/; revision=707320