Clean up and merge Linux and BSD instructions

 * Now BSDs don't require setting environment for configure.
 * No default Makefile any more.

README.md

@@ -19,13 +19,15 @@ or download and extract zip
     $ wget https://github.com/vysheng/tg/archive/master.zip -O tg-master.zip
     $ unzip tg-master.zip && cd tg-master
     
-#### Linux
+#### Linux and BSDs
+
+Install libs: readline or libedit, openssl and (if you want to use config) libconfig and liblua.
+If you do not want to use them pass options --disable-libconfig and --disable-liblua respectively.
 
-Install libs: readline openssl and (if you want to use config) libconfig and liblua.
-If you do not want to use them pass options --disable-libconfig and --disable-liblua respectively
 On ubuntu use: 
     
     $ sudo apt-get install libreadline-dev libconfig-dev libssl-dev lua5.2 liblua5.2-dev
+
 On gentoo:
     
     $ sudo emerge -av sys-libs/readline dev-libs/libconfig dev-libs/openssl dev-lang/lua
@@ -34,7 +36,13 @@ On Fedora:
 
     $ sudo yum install lua-devel openssl-devel libconfig-devel readline-devel
 
-Default Makefile uses liblua5.2 from ubuntu. If you use different version of liblua or linux you have to run ./configure script or you will get some strange compilation error. 
+On FreeBSD:
+
+    $ pkg install libconfig libexecinfo lua52
+
+On OpenBSD:
+
+    $ pkg_add libconfig libexecinfo lua
 
 Then
 
@@ -55,31 +63,6 @@ The client depends on [readline library](http://cnswww.cns.cwru.edu/php/chet/rea
     
 Thanks to [@jfontan](https://github.com/vysheng/tg/issues/3#issuecomment-28293731) for this solution.
 
-#### FreeBSD
-
-Install these ports:
-
-* devel/libconfig
-* devel/libexecinfo
-* lang/lua52
-
-Then build:
-
-    $ env CC=clang CPPFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib ./configure
-    $ make
-    
-#### OpenBSD
-
-Install these packages (or *ports*):
-
-* libconfig (*devel/libconfig*)
-* libexecinfo (*devel/libexecinfo*)
-* lua >= 5.2 (*lang/lua/5.2*)
-
-Then build:
-
-    $ CPPFLAGS="-I/usr/local/include" LDFLAGS="-L/usr/local/lib" ./configure
-    $ make
 
 #### Other UNIX