tswrdb now requires the path to the install directory

This is to prepare for string export, since the language indices are
retained in tswinstalldir/Data/text
Added prototype RdbType 1030002 (strings) reader

Class that can read a bytearray of the string collection
Added placeholder string export command

Hardcoded call to test the functionality aswell
Refactored and split export functionality to a read -> write pipeline

This is so we can do transformations on read data later
Removed outputDirectory from RdbDataFileReader
Added a buffer post-readdata stage for transforming a buffer to CSV

This allows working string export
Did a little refactor and fixed some errors in the xml transformation
Added working string export with language filter
Renamed to StringRdbDataXmlTransformer
Updated opts

Added some text to the strings command
Updated README with new usage and another example
Fixed some forgotten linebreaks