Inherit tech sidebar topic headings.

Modified the build script and sidebar template so that the sidebar
can be constructed from two parts.  sidebar.md provides the first
part and sidebar2.md provides the second level part.

Now the tech topics don't need to duplicate the main topic list in
their own sidebars.

Also added Mac installation instructions to the README.

Change-Id: Iea6a169e00159deb9b2e78cfd5291d2ad6f17147
diff --git a/src/tech/bluetooth/sidebar.md b/src/tech/bluetooth/sidebar.md
deleted file mode 100644
index e57e2b0..0000000
--- a/src/tech/bluetooth/sidebar.md
+++ /dev/null
@@ -1,7 +0,0 @@
-# Topics #
-- [Dalvik](/tech/dalvik/index.html)
-- [Bluetooth](/tech/bluetooth/index.html)
-- [NFC](/tech/nfc/index.html)
-- [Encryption](/tech/encryption/index.html)
-
-# Bluetooth Topics #
diff --git a/src/tech/bluetooth/sidebar2.md b/src/tech/bluetooth/sidebar2.md
new file mode 100644
index 0000000..2075d11
--- /dev/null
+++ b/src/tech/bluetooth/sidebar2.md
@@ -0,0 +1 @@
+# Bluetooth Topics #
diff --git a/src/tech/dalvik/sidebar.md b/src/tech/dalvik/sidebar.md
deleted file mode 100644
index 2aef4f3..0000000
--- a/src/tech/dalvik/sidebar.md
+++ /dev/null
@@ -1,10 +0,0 @@
-# Topics #
-- [Dalvik](/tech/dalvik/index.html)
-- [Bluetooth](/tech/bluetooth/index.html)
-- [NFC](/tech/nfc/index.html)
-- [Encryption](/tech/encryption/index.html)
-
-# Dalvik Topics #
-- [Bytecode Format](dalvik-bytecode.html)
-- [.Dex Format](dex-format.html)
-- [Instruction Formats](instruction-formats.html)
diff --git a/src/tech/dalvik/sidebar2.md b/src/tech/dalvik/sidebar2.md
new file mode 100644
index 0000000..fa825b3
--- /dev/null
+++ b/src/tech/dalvik/sidebar2.md
@@ -0,0 +1,4 @@
+# Dalvik Topics #
+- [Bytecode Format](dalvik-bytecode.html)
+- [.Dex Format](dex-format.html)
+- [Instruction Formats](instruction-formats.html)
diff --git a/src/tech/encryption/sidebar.md b/src/tech/encryption/sidebar.md
deleted file mode 100644
index e1f9ad7..0000000
--- a/src/tech/encryption/sidebar.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# Topics #
-- [Dalvik](/tech/dalvik/index.html)
-- [Bluetooth](/tech/bluetooth/index.html)
-- [NFC](/tech/nfc/index.html)
-- [Encryption](/tech/encryption/index.html)
-
-# Encryption Topics #
-- [Android Encryption Implementation](/tech/encryption/android_crypto_implementation.html)
-
diff --git a/src/tech/encryption/sidebar2.md b/src/tech/encryption/sidebar2.md
new file mode 100644
index 0000000..f201414
--- /dev/null
+++ b/src/tech/encryption/sidebar2.md
@@ -0,0 +1,3 @@
+# Encryption Topics #
+- [Android Encryption Implementation](/tech/encryption/android_crypto_implementation.html)
+
diff --git a/src/tech/nfc/sidebar.md b/src/tech/nfc/sidebar.md
deleted file mode 100644
index aa51014..0000000
--- a/src/tech/nfc/sidebar.md
+++ /dev/null
@@ -1,7 +0,0 @@
-# Topics #
-- [Dalvik](/tech/dalvik/index.html)
-- [Bluetooth](/tech/bluetooth/index.html)
-- [NFC](/tech/nfc/index.html)
-- [Encryption](/tech/encryption/index.html)
-
-# NFC Topics #
diff --git a/src/tech/nfc/sidebar2.md b/src/tech/nfc/sidebar2.md
new file mode 100644
index 0000000..8579d80
--- /dev/null
+++ b/src/tech/nfc/sidebar2.md
@@ -0,0 +1 @@
+# NFC Topics #
diff --git a/src/tech/sidebar.md b/src/tech/sidebar.md
index 11c01b3..d1d6dbb 100644
--- a/src/tech/sidebar.md
+++ b/src/tech/sidebar.md
@@ -1,5 +1,5 @@
 # Topics #
-- [Dalvik](/tech/dalvik/index.html)
 - [Bluetooth](/tech/bluetooth/index.html)
-- [NFC](/tech/nfc/index.html)
+- [Dalvik](/tech/dalvik/index.html)
 - [Encryption](/tech/encryption/index.html)
+- [NFC](/tech/nfc/index.html)