Could not process xlsm document

[blcham]

When I tried to process xlsm document I got the following error :
org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
at org.apache.poi.poifs.storage.HeaderBlock.(HeaderBlock.java:133)
at org.apache.poi.poifs.storage.HeaderBlock.(HeaderBlock.java:106)

[blcham]

xlsm files is confidential thus try to find another one first please.

[rodionnv]

Fixed in #222. Now the type of the excel file should be set explicitly:

* - "application/vnd.ms-excel" - EXCEL (XLS) file.
* - "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" - EXCEL (XLSX) file.
* - "application/vnd.ms-excel.sheet.macroEnabled.12" - EXCEL (XLSM) file.

[blcham]

@rodionnv, Good job!

Moreover, can we autodetect it somehow if the type is not provided? (we would not do it now but later as enhancement of the module)