Fix compiling instructions

README.md

@@ -43,11 +43,35 @@ Restic is a program that does backups right. The design goals are:
 Building
 ========
 
-Install Go/Golang (at least 1.3), then run:
+Install Go/Golang (at least version 1.3), then run `make`, afterwards you'll
+find the binary in the current directory:
 
-    export GOPATH=~/src/go
-    go get github.com/restic/restic/cmd/restic
-    $GOPATH/bin/restic --help
+   $ make
+   [...]
+
+   $ ./restic --help
+   Usage:
+     restic [OPTIONS] <command>
+
+   Application Options:
+     -r, --repo= Repository directory to backup to/restore from
+
+   Help Options:
+     -h, --help  Show this help message
+
+   Available commands:
+     backup     save file/directory
+     cache      manage cache
+     cat        dump something
+     find       find a file/directory
+     fsck       check the repository
+     init       create repository
+     key        manage keys
+     list       lists data
+     ls         list files
+     restore    restore a snapshot
+     snapshots  show snapshots
+     version    display version
 
 
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