added exception for linking against OpenSSL

Ignore-this: aba855c5280a73b7620da6db34380d29

OpenSSL and GPLv3 do not play nice. Added an exception to allow linking against OpenSSL.

Also a couple of files had no copyright notice!

darcs-hash:20140915224119-c21fe-7d0ffe9bb2aae07a0d26eb3bdfb297f1071f3d07
replaced OpenSSL references with Botan

Ignore-this: aa8f36c36cdc6b94b96dac3ec4651a2b

Added Botan's license to COPYING.Botan

darcs-hash:20140916125502-c21fe-c48ea3aedf538de384aa9443405491968c1e723c
added libsnappy and libopus to INSTALL

Ignore-this: 64fccf10f4afe01b166c1e6050002db2

darcs-hash:20140916125912-c21fe-0bdeb6adaf88160f9950ade92a765a680eaf63e6
fixed some wording in INSTALL

Ignore-this: ebac16ebcc8d1f9343eba5e1115c1137

darcs-hash:20140916130314-c21fe-cc5fc1560ff8ff126d9a942ec4c4ef2fd1a2902a
Turned INSTALL into a markdown document

Ignore-this: d13a9636276aae8365ec788836435aef

darcs-hash:20140916130603-c21fe-d31140aa4c0742c9ce1229461589b152293c4c36
updated changelog

Ignore-this: c96ee12672cacaf3847725568adc8284

darcs-hash:20140916130803-c21fe-55637c4f8f4809f4c583af1c368e968c5eb15a07
testing cpack

Ignore-this: 115017f300dc8a4e0dd64c600b9f9619

darcs-hash:20140916142221-c21fe-7f5f23297ba0ef64c694fd0a9ccef6098935652d