Add support for Euler

[Mojca Miklavec]

The minimals do not contain all the fonts needed for Euler. You will need
to download the following fonts and place them in an appropriate location:

cmb10.pfb cmbx8.pfb cmff10.pfb cmmi5.pfb cmr12.pfb cmsl10.pfb
cmss17.pfb cmssi17.pfb cmsy6.pfb cmtex9.pfb cmtt12.pfb
cmbsy10.pfb cmbx9.pfb cmfi10.pfb cmmi6.pfb cmr17.pfb cmsl12.pfb
cmss8.pfb cmssi8.pfb cmsy7.pfb cmti10.pfb cmtt8.pfb
cmbx10.pfb cmbxsl10.pfb cmfib8.pfb cmmi7.pfb cmr5.pfb cmsl8.pfb
cmss9.pfb cmssi9.pfb cmsy8.pfb cmti12.pfb cmtt9.pfb
cmbx12.pfb cmbxti10.pfb cminch.pfb cmmi8.pfb cmr6.pfb cmsl9.pfb
cmssbx10.pfb cmssq8.pfb cmsy9.pfb cmti7.pfb cmu10.pfb
cmbx5.pfb cmcsc10.pfb cmitt10.pfb cmmi9.pfb cmr7.pfb
cmsltt10.pfb cmssdc10.pfb cmssqi8.pfb cmtcsc10.pfb cmti8.pfb
cmvtt10.pfb
cmbx6.pfb cmdunh10.pfb cmmi10.pfb cmmib10.pfb cmr8.pfb cmss10.pfb
cmssi10.pfb cmsy10.pfb cmtex10.pfb cmti9.pfb
cmbx7.pfb cmex10.pfb cmmi12.pfb cmr10.pfb cmr9.pfb cmss12.pfb
cmssi12.pfb cmsy5.pfb cmtex8.pfb cmtt10.pfb

[Mojca Miklavec (mojca-miklavec-lists)]

\definetypeface [mainface][mm][math] [euler] [default] [text=rm]
\setupbodyfont[mainface, 12pt]

\starttext
\showmathcharacters
\stoptext