Merge branch 'release/0.4.1'

* release/0.4.1:
  bumped version to 0.4.1
  updated documentation with usage

.version

@@ -1 +1 @@
-0.4.0
+0.4.1

README.md

@@ -13,8 +13,8 @@ correct versioning for official releases (git flow release).
 [semver]: https://github.com/mojombo/semver
 [gitflow]: https://github.com/nvie/gitflow
 
-usage
------
+examples
+--------
 
 Basic operations
 
@@ -66,3 +66,44 @@ Advanced operations
     1.2.3-rc2+meta
     $ semver
     1.0.1-rc2
+
+
+usage
+-----
+
+    Usage:
+      semver
+      semver init [<version>]
+      semver bump [(major|minor|patch|prerel <prerel>|meta <meta>) | --force <version>] [--pretend]
+      semver compare <version> [<oldversion>]
+      semver --help
+      semver --version
+
+    Arguments:
+      <version>  A version must match the following regex pattern:
+                 "^[0-9]*\.[0-9]*\.[0-9]*(-[0-9A-Za-z-]*)?(+[0-9A-Za-z-]*)?$".
+                 In english, the version must match X.Y.Z(-PRERELEASE)(+METADATA)
+                 where X, Y and Z are positive integers, PRERELEASE is an optionnal
+                 string composed of alphanumeric characters and hyphens and
+                 METADATA is also an optional string composed of alphanumeric
+                 characters and hyphens.
+
+      <oldversion>  See <version> definition.
+
+      <prerel>  String that must be composed of alphanumeric characters and hyphens.
+
+      <meta>  String that must be composed of alphanumeric characters and hyphens.
+
+    Options:
+      -f, --force=<version>  Forces a bump of any version without checking if it
+                             respects semver bumping rules.
+      -p, --pretend          Do not overwrite the project's version file, only
+                             output what the new version string would be.
+      -v, --version          Print the version of this tool.
+      -h, --help             Print this help message.
+
+    Commands:
+      init     initialize this project's version.
+      bump     this project's version by one of major, minor, patch, prerel, meta
+               or a forced potentialy conflicting version.
+      compare  <version> to this project's version or to provided <oldversion>.

src/semver

@@ -9,7 +9,7 @@ SEMVER_REGEX="^[0-9]*\.[0-9]*\.[0-9]*(-[0-9A-Za-z-]*)?(+[0-9A-Za-z-]*)?$"
 SEMVER_REGEX_BASH="^([0-9]*)\.([0-9]*)\.([0-9]*)(\-[0-9A-Za-z-]+)?(\+[0-9A-Za-z-]+)?$"
 
 PROG="semver"
-PROG_VERSION=0.4.0
+PROG_VERSION=0.4.1
 
 VERSION_FILE=.version
 DEFAULT_VERSION=0.1.0
@@ -48,8 +48,8 @@ Options:
 
 Commands:
   init     initialize this project's version.
-  bump     this project's version by one of major, minor or patch or a forced
-           potentialy conflicting version.
+  bump     this project's version by one of major, minor, patch, prerel, meta
+           or a forced potentialy conflicting version.
   compare  <version> to this project's version or to provided <oldversion>."