updated the CHANGELOG covering v1.1.0

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+## v1.1.0
+
+The first major feature release to `datamaps`.
+
+### Simple data validation
+
+The user is now able to stipulate the type of data expected to be
+returned per cell during the `import templates` phase. Allowable types at this
+stage are simply `TEXT`, `NUMBER` and `DATE`.
+
+The types are declared in the datamap in a new column headed 'type'. Upon
+import, datamaps will validate the value of the data in that particular cell
+according to the required type and output the results in a CSV file in the
+default output directory.
+
+Type-validation is entirely optional: if no type column is included in the
+datamap file, no validation is carried out. If a type column *is* included and
+only a handful of datamap entries have types declared, a validation report is
+produced, but only those cells are assessed - the rest are declared as UNTYPED.
+
+Empty cells in the template that are expected by the datamap are flagged in the
+validation report. The logic here is that if the cell is in the datamap in the
+first place, we should expect a value returned.
+
+If the user only requires validation for a single template or batch of
+templates - and no master.xlsx to be produced - this can now be set using the
+`-v` flag:
+
+`datamaps import templates -v`. Please not that the `-m` and `-v` flags are
+mutually exclusive.
+
+The validation report is in CSV format to allow for rudimentary sorting and
+filtering in a spreadsheet program.
+
+This is the first iteration of validation in datamaps - more sophisticated
+validation is planned for future releases, with rules-based types such as 
+greater-than and less-than for numbers, date ranges and text minimum and maximum 
+lengths in the frame.
+
+### Change to setting the row limit
+
+The row limiting feature released in `v1.0.7` must now be set using
+a `--rowlimit` option to `datamaps import templates` and there is no longer any
+need to change the `config.ini` file.  The default row limit remains 500.
+
+### Configurable input directory
+
+The input directory can now be overridden using the `--inputdir` option to
+`datamaps import templates`. In future releases, it may be possible to override
+the output directory also.
+
+### Help documentation
+
+The `--help` documentation has been improved across the board.
+
+### Bugfixes
+
+Some minor bugfixes introduced in recent releases.
+
+
 ## v1.0.9
 
 * Bug fixes.