TLSH version 4.8.2 improved install and portability

Improve portability, add shared library build, install tlsh_unittest
Merged in pull request 103. Thanks to Dkapps for pull request 103
Merged in pull request 107. Thanks to cgull  for pull request 107

It would appear that this release has no issues (so far)
We have modified the install and attempted to increase portability.
Please contact us or raise an issue if you have problems.