Fix library version and SONAME

With the switch from autotools to CMake the library versioning was not adapted
correctly. (a11a5fb6c466f4a28a35462ac3d3a5725b6e81a0)

For autotools @-version-info N:N:N@ was used to set the library version, for
CMake the library version is incorrectly set as the SOVERSION instead. The
SOVERSION is an incrementing integer and is configured separately from the
library version.
Fix #29: las2las: error interpreting --maxx clause

This should fix [libLAS/libLAS Issue #29](https://github.com/libLAS/libLAS/issues/29) reported by @assismauro.
Added Python 3 support
attempt to apply a fix for #33
Merge pull request #31 from rickhg12hs/fix-laskernel

Fix #29: las2las: error interpreting --maxx clause
Merge pull request #30 from sebastic/soversion

Fix library version and SONAME
Rewrote tests for Python 3
Merge pull request #34 from jdreaver/master

Added Python 3 support
Add instructions for installing libLAS on OSX

These instructions are for Homebrew only. Otherwise, the reader is
directed to the compilation section.
Merge pull request #36 from gadomski/doc/osx-installation

Add instructions for installing libLAS on OSX
remove old LAStools utilities that don't belong in liblas #39
Merge pull request #40 from libLAS/remove-lastools-utilities

remove old LAStools utilities that don't belong in liblas #39
Fix 'seperator' typo, replace with 'separator'.
Merge pull request #41 from sebastic/separator-typo

Fix 'seperator' typo, replace with 'separator'.
apply fix for #37 to support reading (but not interpreting) extra bytes in files
Merge pull request #42 from libLAS/extra_bytes

apply fix for #37 to support reading (but not interpreting) extra bytes in files
increment version to 1.8.0 #35
Remove boost/cstdint.hpp usage and instead move to <stdint.h>. Turn up
the warning noise and clean up issues related to them.
Merge pull request #43 from libLAS/remove_boost_int_types

Remove boost/cstdint.hpp usage and instead move to <stdint.h>. Turn up the warning noise and clean up issues related to them.
remove liblas::guid, which was a poor implementation of boost::uuid::uuid, which is everywhere nowadays