Changes in version 0.4                         

    o   Updates the documentation in varios places

    o   Improves convenient functions
	- adds error handling
	- smarter search 
	- Adding unit test to test the api calls

    o   Adds new convenient functions

                         Changes in version 0.3                         

    o   updates to latest api version 1.4 which introduces an exact match of 
	datasets (task = fetch)

    o   introduces new smarter interface for search 
	- now embraces character search, default search, and search in notes

    o   introduces new annotation features. 
	- These allow to find common concepts for contents in data frames
	- It searches for the terms on tematres and makes a guess about the content
	  in columns. It returns a annotation metadata object that can be used 
	  to start build up more sophisticated metadata automatically later on.
	- adds a few conversion and checking tools for iso dates. They try to 
	  convert to ISO 8601 format for a few formats and give you feedback if
	  a date in ISO 8601 is in a column.
	    as.IsoDate(testdata_with_dates$date)
	    is.IsoDate(testdata_with_dates$date)

                  Changes in version 0.2 (2013-08-23)                   

    o   introduces a convenience function for all tasks that takes strings as 
	input only. So you do not have to transform the term you are looking
	for into an id to communicate with the server anymore. 

                  Changes in version 0.1 (2013-08-13)                   

    o   Initial version of rtematres. Introduces the base api functions

    o   Also comes with helpers to convert an id to a key and vice versa 

    o   Higher functions that leverage the search for terms, relations to upper 
	and narrower keywords as well as desriptions.