-) sys.source on Windows uses the default locale and NOT
   UTF-8, so all UTF8-strings will be broken. Instead
   explicitly use the same code (readLines with subsequent
   parse and eval calls) as sys.source, but add the UTF-8
   encoding to readLines.

mT.setDimInfo: Rename first argument from "table" to "tbl" to allow using "table" as a dim info factor

Austria: Implement MCMC-decomposition (by Jonas Hirz) of Austrian population 1980--2017

See merge request !1

-) Handle NA values in all utility functions
-) Provide AT population forecast as array
-) Fix AVOe1999-R

Extend mortalityTables.load and .list to search all installed packages for table data (using regexp in the package namse)

Also make sure the providing package is loaded when a corresponding data set is loaded

New function: mT.switchover - transition from one table to another either at fixed age or by the given weights

mT.fitExtrapolationLaw: Add raw argument to allow passing raw data to be used for fitting, or alternatively use the rawProbs slot of the table's data slot (filled by whittaker.mortalityTable)

Some tables need to adjust probabilities (e.g. Heubeck needs to calculate the qg from all other probabilities)

Extend all utility functions to accept arrays and general lists of mortalityTable objects. The list/array structure should be preseved...

applying the mT.* utility functions to arrays of tables caused the dimensions to disappear => add the dimensions back

Implement dimensional factors in the plot functions for table comparisons and for the trend

Don't define any shape in plotMortalityTables; They can be later given as an explicit aes(..) object, anyway