Include FTFs in output

Starting with version 0.3, pygcstats can include your FTFs in the output.
pygcstats does not do any automatic parsing of the logs for a FTF, but expects a list of the cache IDs you made FTF in the file "formatters/templates_general/ftf.txt", whereas each line should have only one cache ID, written in all upper case or all lower case letters.
For each cache ID given in the file but not found in the database, an error message is given on the command-line while generating the statistics. Anyway, the generation of the statistics itself is not affected or aborted by that.

To include the FTFs, just add the option --ftf when calling the program:

$ python pygcstats.py --ftf