Added external SQLite library.

external/SQLite/license.txt

@@ -0,0 +1,69 @@
+Copyright Release for
+Contributions To SQLite
+
+
+SQLite is software that implements an embeddable SQL database engine.
+SQLite is available for free download from http://www.sqlite.org/.
+The principal author and maintainer of SQLite has disclaimed all
+copyright interest in his contributions to SQLite
+and thus released his contributions into the public domain.
+In order to keep the SQLite software unencumbered by copyright
+claims, the principal author asks others who may from time to
+time contribute changes and enhancements to likewise disclaim
+their own individual copyright interest.
+
+Because the SQLite software found at http://www.sqlite.org/ is in the
+public domain, anyone is free to download the SQLite software
+from that website, make changes to the software, use, distribute,
+or sell the modified software, under either the original name or
+under some new name, without any need to obtain permission, pay
+royalties, acknowledge the original source of the software, or
+in any other way compensate, identify, or notify the original authors.  
+Nobody is in any way compelled to contribute their SQLite changes and 
+enhancements back to the SQLite website.  This document concerns
+only changes and enhancements to SQLite that are intentionally and
+deliberately contributed back to the SQLite website.  
+
+For the purposes of this document, "SQLite software" shall mean any
+computer source code, documentation, makefiles, test scripts, or
+other information that is published on the SQLite website, 
+http://www.sqlite.org/.  Precompiled binaries are excluded from
+the definition of "SQLite software" in this document because the
+process of compiling the software may introduce information from
+outside sources which is not properly a part of SQLite.
+
+The header comments on the SQLite source files exhort the reader to
+share freely and to never take more than one gives.
+In the spirit of that exhortation I make the following declarations:
+
+1) I dedicate to the public domain 
+any and all copyright interest in the SQLite software that
+was publicly available on the SQLite website (http://www.sqlite.org/) prior
+to the date of the signature below and any changes or enhancements to
+the SQLite software 
+that I may cause to be published on that website in the future.
+I make this dedication for the benefit of the public at large and
+to the detriment of my heirs and successors.  I intend this
+dedication to be an overt act of relinquishment in perpetuity of
+all present and future rights to the SQLite software under copyright
+law.
+
+2) To the best of my knowledge and belief, the changes and enhancements that
+I have contributed to SQLite are either originally written by me
+or are derived from prior works which I have verified are also
+in the public domain and are not subject to claims of copyright
+by other parties.
+
+3) To the best of my knowledge and belief, no individual, business, organization,
+government, or other entity has any copyright interest
+in the SQLite software as it existed on the
+SQLite website as of the date on the signature line below.
+
+4) I agree never to publish any additional information
+to the SQLite website (by CVS, email, scp, FTP, or any other means) unless
+that information is an original work of authorship by me or is derived from 
+prior published versions of SQLite.
+I agree never to copy and paste code into the SQLite code base from
+other sources.
+I agree never to publish on the SQLite website any information that
+would violate a law or breach a contract.