README: cosmetics
README: cosmetics

- update swig function references
- remove references to decode_vp8.h (no longer installed)
- add lossless references
- some grammar/spelling changes

Change-Id: Icebfbcf6f638762f42d844b6bd3c0129c64d9340

cysp/libwebp,yohunl/libwebp,ya7lelkom/libwebp,iniwf/webm.libwebp,Suvarna1488/webm.libwebp,yohunl/libwebp,jacklicn/libwebp,altogother/webm.libwebp,keane83/BLE_IM,abwiz0086/webm.libwebp,ttyangf/libwebp,imazen/libwebp,PKRoma/libwebp,comoyo/gonzo-libwebp,reimaginemedia/webm.libwebp,kalli123/webm.libwebp,kalli123/webm.libwebp,PKRoma/libwebp,iniwf/webm.libwebp,kleopatra999/webm.libwebp,PKRoma/libwebp,abwiz0086/webm.libwebp,kleopatra999/webm.libwebp,jiehu5114/libwebp,kleopatra999/webm.libwebp,comoyo/gonzo-libwebp,Tekserve/libwebp,webmproject/libwebp,matanbs/webm.libwebp,iniwf/webm.libwebp,dumganhar/libwebp,ericmckean/webm.libwebp,matanbs/webm.libwebp,dumganhar/libwebp,yohunl/libwebp,jacklicn/libwebp,kim42083/webm.libwebp,matanbs/webm.libwebp,gshORTON/webm.libwebp,comoyo/gonzo-libwebp,Suvarna1488/webm.libwebp,gshORTON/webm.libwebp,matanbs/webm.libwebp,abwiz0086/webm.libwebp,yohunl/libwebp,keane83/BLE_IM,zofuthan/libwebp,Acidburn0zzz/webm.libwebp,keane83/BLE_IM,appunite/libwebp,kleopatra999/webm.libwebp,appunite/libwebp,Suvarna1488/webm.libwebp,cysp/libwebp,jacklicn/libwebp,gshORTON/webm.libwebp,keane83/BLE_IM,altogother/webm.libwebp,kim42083/webm.libwebp,appunite/libwebp,appunite/libwebp,abwiz0086/webm.libwebp,PKRoma/libwebp,Aexyn/libwebp,ericmckean/webm.libwebp,iniwf/webm.libwebp,jiehu5114/libwebp,jiehu5114/libwebp,Maria1099/webm.libwebp,imazen/libwebp,jacklicn/libwebp,iniwf/webm.libwebp,Maria1099/webm.libwebp,kalli123/webm.libwebp,reimaginemedia/webm.libwebp,gshORTON/webm.libwebp,ttyangf/libwebp,keane83/BLE_IM,gshORTON/webm.libwebp,matanbs/webm.libwebp,comoyo/gonzo-libwebp,Aexyn/libwebp,rxl194/libwebp,PKRoma/libwebp,zofuthan/libwebp,ya7lelkom/libwebp,appunite/libwebp,dumganhar/libwebp,Suvarna1488/webm.libwebp,imazen/libwebp,ya7lelkom/libwebp,Acidburn0zzz/webm.libwebp,zofuthan/libwebp,reimaginemedia/webm.libwebp,cysp/libwebp,zofuthan/libwebp,Acidburn0zzz/webm.libwebp,Distrotech/libwebp,Tekserve/libwebp,jacklicn/libwebp,jiehu5114/libwebp,Aexyn/libwebp,abwiz0086/webm.libwebp,rxl194/libwebp,rxl194/libwebp,Tekserve/libwebp,Distrotech/libwebp,redengineer/libwebp,rxl194/libwebp,ya7lelkom/libwebp,reimaginemedia/webm.libwebp,ya7lelkom/libwebp,ericmckean/webm.libwebp,Maria1099/webm.libwebp,Acidburn0zzz/webm.libwebp,PKRoma/libwebp,altogother/webm.libwebp,ttyangf/libwebp,webmproject/libwebp,ttyangf/libwebp,imazen/libwebp,kalli123/webm.libwebp,yohunl/libwebp,comoyo/gonzo-libwebp,comoyo/gonzo-libwebp,altogother/webm.libwebp,Acidburn0zzz/webm.libwebp,kim42083/webm.libwebp,kim42083/webm.libwebp,appunite/libwebp,reimaginemedia/webm.libwebp,webmproject/libwebp,kalli123/webm.libwebp,ttyangf/libwebp,altogother/webm.libwebp,cysp/libwebp,redengineer/libwebp,kim42083/webm.libwebp,Suvarna1488/webm.libwebp,redengineer/libwebp,redengineer/libwebp,ericmckean/webm.libwebp,kleopatra999/webm.libwebp,Aexyn/libwebp,jiehu5114/libwebp,Maria1099/webm.libwebp,webmproject/libwebp,rxl194/libwebp,Maria1099/webm.libwebp,Distrotech/libwebp,redengineer/libwebp,comoyo/gonzo-libwebp,zofuthan/libwebp,Tekserve/libwebp,ericmckean/webm.libwebp,Aexyn/libwebp,imazen/libwebp,webmproject/libwebp