v0.1.2

• Add LineInterpolatePoint -- returns a point interpolated along a line, ala
  similar functionality in PostGIS, useful for geocoding, for example.
• Allow GEOS version 3.3.9 (in addition to 3.3.8) -- support for GEOS version >=
  3.4.x may be pending in 0.1.3.
• Add ProjectNormalized -- linear referencing function (thanks, bdon@bdon.org!)
• Fix race condition -- library should be thread-safe with respect to underlying
  GEOS C library.