add lazyloader support

lazy_loader is copied to Ext now, modified external imports to lazy_load

add a few more imports to be lazy loaded, think the install path is correct now

[TD]"<" symbol embedded in html

revert changes to path modules for testing

use lazyloader in PathAreaOp.py

add back in deferred loading

temp change to print error message in tests

temp change to print error message in tests

add _init__.py to lazy_loader

make install in CMakeLists.txt one line

src/Mod/Path/PathScripts/PathPocketShape.py

@@ -24,15 +24,18 @@
 # ***************************************************************************
 
 import FreeCAD
-import Part
 import PathScripts.PathGeom as PathGeom
 import PathScripts.PathLog as PathLog
 import PathScripts.PathOp as PathOp
 import PathScripts.PathPocketBase as PathPocketBase
 import PathScripts.PathUtils as PathUtils
-import TechDraw
 import math
-import Draft
+
+# lazily loaded modules
+from lazy_loader.lazy_loader import LazyLoader
+Draft = LazyLoader('Draft', globals(), 'Draft')
+Part = LazyLoader('Part', globals(), 'Part')
+TechDraw = LazyLoader('TechDraw', globals(), 'TechDraw')
 
 from PySide import QtCore