pimage linux minor optimisation
tkWinGDIPlusPath.cpp: remove trailing whitespace, tab-to-space

Rationale:
- Trailing whitespace caused tons of false differences at each commit
- Tab usage was VERY inconsistent in the source
ptext: added options: -fontslant {normal|italic|oblique}, -fontweight {normal|bold}
ptext: -textanchor: extended with n|w|s|e|nw|ne|sw|se|c
ptext: added -textanchor demo
ptext: added -filloverstroke BOOLEAN option
pimage: implemented -fillopacity (on linux&win)
demos: added example for pimage -width/-height and -fillopacity
demos: some files contained old Mac line endings (CR only)
demos: test linear gradient and -fillopacity
pimage: added -anchor {n|e|s|w|ne|nw|se|sw|c} option
pImage: added tint support (LINUX & WIN): -tintcolor COLOR -tintamount 0.0-1.0

WIN code by Andras Varga
macosx: implemented pimage -fillOpacity 0.0-1.0, -tintcolor COLOR -tintamount 0.0-1.0
TMP: demos
textanchor demo
bugfix on linux: -strokedasharray should use relative to strokewidth
demos: fixed demo names (should be unique)
demos: text bold/italic
pimage: added -interpolation {none|fast|best} option
disable error: 'matrix ... is close to singular'