- Fix compilation warnings
- Update `.gitignore`
- Repaint CPU load history after the user changes the update interval
- Properly initialize current usage bars
- Scale CPU load history chart according to the current update interval
- Store history in a circular buffer
- Add timestamps to CPU load history
- Code cleanup: Add newlines to enum typedefs
- Simplify and sort .gitignore
- Use AC_CONFIG_MACRO_DIRS as suggested by libtoolize
- Update copyright year
- configure.ac: use AC_PROG_CC_C99
- Add cpugraph update rate enum
- Include stdlib.h for strtol
- Update configuration files
- Translation Updates:
  Albanian, Arabic, Armenian (Armenia), Basque, Belarusian, Bulgarian,
  Catalan, Chinese (China), Chinese (Taiwan), Croatian, Czech, Danish,
  Dutch, Eastern Armenian, English (Australia), English (United
  Kingdom), Estonian, Finnish, French, Galician, German, Greek, Hebrew,
  Hungarian, Icelandic, Indonesian, Interlingue, Italian, Japanese,
  Kazakh, Korean, Lithuanian, Malay, Norwegian Bokmål, Occitan (post
  1500), Polish, Portuguese, Portuguese (Brazil), Russian, Serbian,
  Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Ukrainian, Uyghur