version bump to 0.3.0

This commit includes a poor attempt at a changelog.

CHANGELOG.md

 # go-ipfs changelog
 
-Until we near full stability, this changelog must only
-list breakages and backwards incompatible changes.
 
+### 0.3.0 - 2015-04-20
+
+We've just released version 0.3.0, which contains many
+performance improvements, bugfixes, and new features.
+Perhaps the most noticeable change is moving block storage
+from leveldb to flat files in the filesystem.
+
+What to expect:
+
+* _much faster_ performance
+
+* Repo format 2
+  * moved default location from ~/.go-ipfs -> ~/.ipfs
+  * renamed lock filename daemon.lock -> repo.lock
+  * now using a flat-file datastore for local blocks
+
+* Fixed lots of bugs
+  * proper ipfs-path in various commands
+  * fixed two pinning bugs (recursive pins)
+  * increased yamux streams window (for speed)
+  * increased bitswap workers (+ env var)
+  * fixed memory leaks
+  * ipfs add error returns
+  * daemon exit bugfix
+  * set proper UID and GID on fuse mounts
+
+* Gateway
+  * Added support for HEAD requests
+
+* configuration
+  * env var to turn off SO_REUSEPORT: IPFS_REUSEPORT=false
+  * env var to increase bitswap workers: IPFS_BITSWAP_TASK_WORKERS=n
+
+* other
+  * bash completion is now available
+  * ipfs stats bw -- bandwidth meetering
+
+And many more things.
+
+### 0.2.3 - 2015-03-01
+
+* Alpha Release
 
 ### 2015-01-31:
 

repo/config/version.go

@@ -8,7 +8,7 @@ import (
 )
 
 // CurrentVersionNumber is the current application's version literal
-const CurrentVersionNumber = "0.2.3"
+const CurrentVersionNumber = "0.3.0"
 
 // Version regulates checking if the most recent version is run
 type Version struct {