doc: add install notes

.gitignore

@@ -6,6 +6,8 @@
 *.pb
 TAGS
 ccan/tools/configurator/configurator
+ccan/ccan/cdump/tools/cdump-enumstr
 libsecp256k1.a
 libsecp256k1.la
 gen_*
+daemon/lightning-cli

INSTALL.md

@@ -0,0 +1,29 @@
+Build on Ubuntu 15.10
+---------------------
+
+Build protobuf-c dependency (>= 1.1.0):
+```
+sudo apt-get install libprotoc-dev
+git clone https://github.com/protobuf-c/protobuf-c.git
+cd protobuf-c
+./autogen.sh
+./configure
+make
+make install
+cd ../
+```
+
+Clone lightning and initialize submodules:
+```
+git clone https://github.com/ElementsProject/lightning.git
+cd lighting
+git submodule init
+git submodule update
+```
+
+Build lightning:
+```
+make
+export LD_LIBRARY_PATH=/usr/local/lib
+./daemon/lightningd
+```

Makefile

@@ -204,7 +204,7 @@ CWARNFLAGS := -Werror -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations
 CDEBUGFLAGS := -g -fstack-protector
 CFLAGS := $(CWARNFLAGS) $(CDEBUGFLAGS) -I $(CCANDIR) -I secp256k1/include/ -I . $(FEATURES)
 
-LDLIBS := -lcrypto -lprotobuf-c
+LDLIBS := -lcrypto -lprotobuf-c -lgmp
 $(PROGRAMS): CFLAGS+=-I.
 
 default: $(PROGRAMS) daemon-all