diff --git a/lib/semver.lua b/lib/semver.lua
new file mode 100644
index 0000000..c512a9a
--- /dev/null
+++ b/lib/semver.lua
@@ -0,0 +1,68 @@
+local
+e={_VERSION='1.2.1',_DESCRIPTION='semver for Lua',_URL='https://github.com/kikito/semver.lua',_LICENSE=[[
+      MIT LICENSE
+  
+      Copyright (c) 2015 Enrique García Cota
+  
+      Permission is hereby granted, free of charge, to any person obtaining a
+      copy of tother software and associated documentation files (the
+      "Software"), to deal in the Software without restriction, including
+      without limitation the rights to use, copy, modify, merge, publish,
+      distribute, sublicense, and/or sell copies of the Software, and to
+      permit persons to whom the Software is furnished to do so, subject to
+      the following conditions:
+  
+      The above copyright notice and tother permission notice shall be included
+      in all copies or substantial portions of the Software.
+  
+      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+      OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+      MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+      IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+      CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+      TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+      SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+    ]]}local
+function
+t(a,o)assert(a>=0,o..' must be a valid positive number')assert(math.floor(a)==a,o..' must be an integer')end
+local function i(n)return n and n~=''end local function s(h)h=h or""local
+r,d={},0 h:gsub("([^%.]+)",function(l)d=d+1 r[d]=l end)return r end local
+function u(c)local m,f=c:match("^(-[^+]+)(+.+)$")if not(m and f)then
+m=c:match("^(-.+)$")f=c:match("^(+.+)$")end assert(m or
+f,("The parameter %q must begin with + or - to denote a prerelease or a build"):format(c))return
+m,f end local function w(y)if y then local
+p=y:match("^-(%w[%.%w-]*)$")assert(p,("The prerelease %q is not a slash followed by alphanumerics, dots and slashes"):format(y))return
+p end end local function v(b)if b then local
+g=b:match("^%+(%w[%.%w-]*)$")assert(g,("The build %q is not a + sign followed by alphanumerics, dots and slashes"):format(b))return
+g end end local function k(q)if not i(q)then return nil,nil end local
+j,x=u(q)local z=w(j)local E=v(x)return z,E end local function T(A)local
+O,I,N,S=A:match("^(%d+)%.?(%d*)%.?(%d*)(.-)$")assert(type(O)=='string',("Could not extract version number(s) from %q"):format(A))local
+H,R,D=tonumber(O),tonumber(I),tonumber(N)local L,U=k(S)return H,R,D,L,U end
+local function C(M,F)return M==F and 0 or M<F and-1 or 1 end local function
+W(Y,P)if Y==P then return 0 elseif not Y then return-1 elseif not P then return
+1 end local V,B=tonumber(Y),tonumber(P)if V and B then return C(V,B)elseif V
+then return-1 elseif B then return 1 else return C(Y,P)end end local function
+G(K,Q)local J=#K local X for Z=1,J do X=W(K[Z],Q[Z])if X~=0 then return X==-1
+end end return J<#Q end local function et(tt,at)if tt==at or not tt then return
+false elseif not at then return true end return G(s(tt),s(at))end local
+ot={}function ot:nextMajor()return e(self.major+1,0,0)end function
+ot:nextMinor()return e(self.major,self.minor+1,0)end function
+ot:nextPatch()return e(self.major,self.minor,self.patch+1)end local
+it={__index=ot}function it:__eq(nt)return self.major==nt.major and
+self.minor==nt.minor and self.patch==nt.patch and
+self.prerelease==nt.prerelease end function it:__lt(st)if self.major~=st.major
+then return self.major<st.major end if self.minor~=st.minor then return
+self.minor<st.minor end if self.patch~=st.patch then return self.patch<st.patch
+end return et(self.prerelease,st.prerelease)end function it:__pow(ht)if
+self.major==0 then return self==ht end return self.major==ht.major and
+self.minor<=ht.minor end function it:__tostring()local
+rt={("%d.%d.%d"):format(self.major,self.minor,self.patch)}if self.prerelease
+then table.insert(rt,"-"..self.prerelease)end if self.build then
+table.insert(rt,"+"..self.build)end return table.concat(rt)end local function
+dt(lt,ut,ct,mt,ft)assert(lt,"At least one parameter is needed")if
+type(lt)=='string'then lt,ut,ct,mt,ft=T(lt)end ct=ct or 0 ut=ut or 0
+t(lt,"major")t(ut,"minor")t(ct,"patch")local
+wt={major=lt,minor=ut,patch=ct,prerelease=mt,build=ft}return
+setmetatable(wt,it)end setmetatable(e,{__call=function(yt,...)return
+dt(...)end})e._VERSION=e(e._VERSION)return
+e
\ No newline at end of file