crengine: return description and keywords metadata

Only available for EPUB documents for now.
crengine bumped (includes css related improvements, fix crash,
better handling of gif by frankyfei).
Also fix pb with permissions in travis build.

.ci/build_script.sh

@@ -11,19 +11,19 @@ if [ "$TARGET" = kobo ]; then
     docker run -t \
         -v "${HOME}"/.ccache:${DOCKER_HOME}/.ccache \
         -v `pwd`:${DOCKER_HOME}/base ${DOCKER_IMG} \
-        /bin/bash -c 'source /home/ko/.bashrc && cd /home/ko/base && make TARGET=kobo all'
+        /bin/bash -c 'source /home/ko/.bashrc && cd /home/ko/base && sudo chown -R ko:ko . && make TARGET=kobo all'
 elif [ "$TARGET" = kindle ]; then
     chmod -R 777 $HOME/.ccache
     docker run -t \
         -v "${HOME}"/.ccache:${DOCKER_HOME}/.ccache \
         -v `pwd`:${DOCKER_HOME}/base ${DOCKER_IMG} \
-        /bin/bash -c 'source /home/ko/.bashrc && cd /home/ko/base && make TARGET=kindle all'
+        /bin/bash -c 'source /home/ko/.bashrc && cd /home/ko/base && sudo chown -R ko:ko . && make TARGET=kindle all'
 elif [ "$TARGET" = pocketbook ]; then
     chmod -R 777 $HOME/.ccache
     docker run -t \
         -v "${HOME}"/.ccache:${DOCKER_HOME}/.ccache \
         -v `pwd`:${DOCKER_HOME}/base ${DOCKER_IMG} \
-        /bin/bash -c "source /home/ko/.bashrc && cd /home/ko/base && make pocketbook-toolchain && make VERBOSE=1 TARGET=pocketbook all"
+        /bin/bash -c "source /home/ko/.bashrc && cd /home/ko/base && sudo chown -R ko:ko . && make pocketbook-toolchain && make VERBOSE=1 TARGET=pocketbook all"
 else
     make all
 fi

cre.cpp

@@ -466,6 +466,14 @@ static int getDocumentProps(lua_State *L) {
 	lua_pushstring(L, UnicodeToLocal(doc->text_view->getSeries()).c_str());
 	lua_settable(L, -3);
 
+	lua_pushstring(L, "description");
+	lua_pushstring(L, UnicodeToLocal(doc->text_view->getDescription()).c_str());
+	lua_settable(L, -3);
+
+	lua_pushstring(L, "keywords");
+	lua_pushstring(L, UnicodeToLocal(doc->text_view->getKeywords()).c_str());
+	lua_settable(L, -3);
+
 	return 1;
 }