vdr-plugin-text2skin

Changes:

- Minor notation correction.
- Refine translations.
- Update HISTORY.
- Make tab width configurable.
- Make MAX_CHARS configurable.
- min from stl to fix build error VDR 2.3.5.
- fix one c++11 compiler warning.
- Detach STRIP from DEBUG flag (thx Tobias Grimm).
- Add VDR API 2.3.1 compatibility for "New token: ChannelServiceReference".
- New token: ChannelServiceReference
- Correct image display using TT6400 high level osd.
- fix compiler error (c++11), in case DEBUG is enabled.
- Purge DEVELOPMENT_FEATURES, permanently enabled with t2s-rerunandtab.diff.
- add VDR API 2.3.1 compatibility for t2s-rerunandtab.diff
- Add compatibility for VDR API >= 2.3.1.