0.3.3 to 0.4:
   * `pax` (Posix) is now required, `cp -al` (GNU specific) is removed
   * "interval" was written with two 'l' (ell), which is wrong in English
   * Changed the name of backup directories, removed the colon in the interval

0.3.2 to 0.3.3:
   * Fix a small bug, which suppressed information when rsync exits non-zero

0.3.1 to 0.3.2:
   * ccollect now prints the start time, end time and duration of the backup
   
0.3 to 0.3.1:
   * added support for printing a summary
   * some cosmetic changes

0.2 to 0.3:
   * added "very_verbose"
   * normal "verbose" is now less verbose
   * added general 'pre_exec' and 'post_exec' support
   * added source specfifc 'pre_exec' and 'post_exec' support

0.1 to 0.2:
   * Added plausibility check
   * Updated and made documentation readable
   * implemented verbose option
   * Fixed double exclude parameter bug
   * Added much better documentation (asciidoc)
   * added rsync extra parameter option