Reverted Ferhat's commit 23e583f95c0a5631c943c44f9116f20b91c0fb0a. The names of the dynSeries variables are stored in a column cell array.

Fixed bug in @dynSeries/align method (occuring if the second dynSeries object has more observations than the first one).

Reverted buggy commit 5366dd5c by Ferhat and added call to strtrim in @dynSeries/extract method to remove leading and trailing white spaces in variable names.

Fixed bug. The cell of strings varlist had wrong dimension (must be a column) if the code is executed with matlab.

Bunch of cosmetic changes

Closes #407