Linear bearing "hull" library

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Generates "hulls" with caps for linear bearings, lm3,4,5,6,8 and 10 at present, The module "bearingHull" takes a few arguments, the only one that's required is model which is the numeric reference for the bearing (lm8 = 8 and so on) . right flips the hull when set to true angle rotates the cutouts and screw posts around the hull rather than deal with axis changes when rotating after the effect. full makes the screw posts extend for the entire length of the hull cutout generats a solid block for use in differencing. bearingHull(model=8,right=false,angle=0,cutout=false,full=false) bearingCap takes only one argument and that being the model bearing_cap(model=8) The screw posts are designed to use m4 screws for all bearing sizes except 3 and 4 which are designed for m3. The bearings-expanded.scad file also contains an expanded list of 600 series bearings for MCAD's bearing library, simple include (NOT use) it after loading the MCAD library and you'll be able to generate 30 or so additional bearing sizes. As yet untested.