Make Approx_ComputeLine algorithm adaptive

---- PROBLEM # 1

One of examples, when approximation algorithm fails is "bugs modalg_5 bug24915" test case (after the fix, this script should be updated to IMPROVE).

The fragment of the WLine:

 ----------- D u m p I n t P a t c h _ W L i n e --------------
Num [X Y Z] [U1 V1] [U2 V2]
                                       ...
 270 [[phone removed]40000 -4.81467964191310390000 [phone removed]00000] [[phone removed]50000 [phone removed]90000] [[phone removed]60000 -0.16473900943604278000]
 271 [[phone removed]30000 -4.86289890083316930000 [phone removed]00000] [[phone removed]40000 [phone removed]52000] [[phone removed]30000 -0.14921541759025503000]
 272 [[phone removed]80000 -4.91113704279707970000 [phone removed]00000] [[phone removed]90000 [phone removed]76000] [[phone removed]90000 -0.13345356306381939000]
 273 [[phone removed]70000 -4.95949041229089540000 [phone removed]00000] [[phone removed]30000 [phone removed]75000] [[phone removed]70000 -0.11736976847892722000]
 274 [[phone removed]80000 -5.00804768146907620000 [phone removed]00000] [[phone removed]20000 [phone removed]34000] [[phone removed]50000 -0.10085865624392509000]
 275 [[phone removed]00000 -5.05697368972781640000 [phone removed]00000] [[phone removed]90000 [phone removed]94000] [[phone removed]20000 -0.08374979795370673900]
 276 [[phone removed]58000 -5.10653496951993800000 [phone removed]00000] [[phone removed]40000 [phone removed]56000] [[phone removed]10000 -0.06576873645070424600]
 277 [[phone removed]42000 -5.15713415452643800000 [phone removed]00000] [[phone removed]10000 [phone removed]81000] [[phone removed]00000 -0.04646582436343127400]
                                       ...
 579 [[phone removed]00000 -52.53774058421905100000 [phone removed]00000] [[phone removed]90000 [phone removed]00000] [[phone removed]10000 [phone removed]00000]
----------- IntPatch_Point :
P( 25.9518819125, 7.8014976062, -0.4356946734) UV1( 3.1415926536, 2.3588491912) UV2( 1.4975014128, -2.3565588358) (Para: 1.0000000000)
----> IntSurf_PntOn2S : 1 Pnt (25.9518819124648,7.80149760621922,-0.435694673408663)
----------- IntPatch_Point :
P( 13.9651264120, -52.5377405842, 16.5453999239) UV1( 4.9514291941, 50.0000000000) UV2( 2.9815398370, 49.9998920003) (Para: 579.0000000000)






However, it is approximated WORSE (only 3D-curve is approximated, 2D-curves are excluded):

#Take point # 276 from WLine
Draw[]> proj c_1 [phone removed]58000 -5.10653496951993800000 [phone removed]00000
# parameter 1 = 0.80708806952489476
#ext_1
Draw[]> length ext_1
#The length ext_1 is 3.[revision removed]-005

A good value must be less than 1.e-7.
See Attachment 1 (PNG) file attached.


---- PROBLEM # 2
In addition, see message [archived tracker link removed]

---- PROBLEM # 3
Test case bugs modalg_6 bug26310_4

Implementation based on
A Heuristic Knot Placement Algorithm for B-Spline Curve Approximation
Weishi Lia, Shuhong Xub, Gang Zhaoc & Li Ping Gohd (http://www.tandfonline.com/doi/abs/10.1080/16864360.2004.10738319?journalCode=tcad20#.VlWcKL_bDRY)