DWDS/Dialing Concordance Code

* fixed weird fatal "ERROR: CheckOccurrences failed! occurrences are not sorted" error for pathologically long token lines
+ v2.1.25 built a consistent index and emitted warnings, but assigned partially indexed file data to *next* corpus file
+ v2.1.26-delwin and later throw this error at end of indexing ("return-bool" -> throw/catch)
* failed document indexing now initiates a rollback of in-memory index buffers via net methods CConcIndexator::RollbackIndexOneFile(), CIndexSetForLoadingStage::RollbackLoadIndex()
+ fixes "orphaned" token data as produced by v2.1.25
* exceptions from CConcIndexator::IndexOneTableTextArea(), CConcIndexator::IndexOneFile() should now be propagated to console and to *._error_log file