Small fix of terminal.
Abolish string key based objects management. Objects managed by static hash code. Thus the "rename" command removed.
Small fix of transform commands.
Use GLSL shader program for rendring objects.
Add command "curve".
zoom fix
add polyline
Merge pull request #11 from kuyon/develop

zoom fix + add polyline
polyline fix
polyline fix catch null
Merge pull request #12 from kuyon/develop

polyline null catch
Support the latest mruby for #df780ae of mruby/mruby.
Add command "hide".
Add command "sew".
Add command "explode".
Add command "bgcolor", but faild to change the color with 3 values(non-gradient backcolor).
Add command "intersect".
Cleanup.
Add TopoDS* headers.
Disable compile non required source.
Remove unrequired source.