Minor README improvements; fix outdated URLs
Change-Id: Ia57f83892471ad85a2301ba4c8ab3df144581000
diff --git a/INSTALL.md b/INSTALL.md
index 369fd9c..6835f61 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -4,17 +4,15 @@
## Prerequisites
-- Install the [ndn-cxx](https://named-data.net/doc/ndn-cxx/current/) library and its prerequisites.
- Please see [Getting Started with ndn-cxx](https://named-data.net/doc/ndn-cxx/current/INSTALL.html)
- for instructions.
- All operating systems and compilers supported by ndn-cxx are also supported by ndn-tools.
+* Install the [ndn-cxx](https://github.com/named-data/ndn-cxx) library and its dependencies.
+ Check out [the documentation](https://docs.named-data.net/ndn-cxx/current/INSTALL.html) for
+ detailed installation instructions. All platforms supported by ndn-cxx are also supported
+ by ndn-tools.
*Note*: If you have installed ndn-cxx from a binary package, please make sure the development
headers are installed (e.g., if using Ubuntu PPA, the `libndn-cxx-dev` package is needed).
-- `libpcap`
-
- Comes with the base system on macOS.
+* Install `libpcap` (except on macOS where it is provided by the base system).
On Debian and Ubuntu: