Rename "LOOT API" to "libloot"

To avoid confusion when talking about the library vs. its API. The GitHub
repository has not yet been renamed, so all references to it are
unchanged.

scripts/set_version_number.py

@@ -31,7 +31,7 @@ def update_resource_file(path, version):
     replace_in_file(path, 'Version", "\d+\.\d+\.\d+"', 'Version", "{}"'.format(version))
 
 if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description = 'Set the LOOT API version number')
+    parser = argparse.ArgumentParser(description = 'Set the libloot version number')
     parser.add_argument('version', nargs='+')
 
     arguments = parser.parse_args()

scripts/travis/libloot.bintray.json

@@ -1,6 +1,6 @@
 {
   "package": {
-    "name": "loot-api",
+    "name": "libloot",
     "repo": "snapshots",
     "subject": "loot"
   },
@@ -8,7 +8,7 @@
     "name": "REPLACE_THIS_VERSION"
   },
   "files": [{
-    "includePattern": "build/package/(loot_api-.+\\.tar.xz)",
+    "includePattern": "build/package/(libloot-.+\\.tar.xz)",
     "uploadPattern": "$1"
   }],
   "publish": true