added how to install tools into README.txt
replaced version 0.10 -> 0.11
removed NOTICE from index.rst
fixed a lack of underline
removed Q&A topic about remote access from FAQ
updated userguide_ja/en for v0.11
added changelog for v0.11
fixed about permission of authtoken file
tweaked supported groovy version at runtime
updated download link for v0.11
got rid of using '!' mark on sample one-liner code

because it may be recognized as special character for expanding previous command by shell