Update version string for v2.1.0 release

Update README and CONTRIBUTORS files

CHANGELOG.md

@@ -1,14 +1,16 @@
 Change Log
 ===============================================================================
-Version 2.1.0 *(2016-xx-xx)*
+Version 2.1.0 *(2016-09-01)*
 ----------------------------
 * Feature: Use multiple GnuCash books in single application
 * Feature: Backup/Export to ownCloud servers
 * Feature: Compact transactions list view for single-entry mode
 * Improved: Redesign of passcode screen with included alphabet keys
 * Improved: Scheduled transactions now have more accurate timestamps
 * Improved: Generate all scheduled transactions even if a scheduled is missed (e.g. device off)
+* Improved: Updated translations (and extracted some hard-coded strings)
 * Fixed: Accounts lists not properly refreshed after switching between recent and all
+* Fixed: Inaccurate execution of some scheduled transactions
 
 Version 2.0.7 *(2016-05-05)*
 ----------------------------

CONTRIBUTORS.md

@@ -0,0 +1,34 @@
+GnuCash for Android is a community effort which is made possible by the contributions of
+several different people.
+Appreciation goes to Muslim Chochlov and the to whole GnuCash community for guiding the
+project through the early phases (as Google Summer of Code project 2012) and providing valuable feedback.
+
+### Core Developers:
+* Ngewi Fet <ngewif@gmail.com> - Project maintainer
+* Yongxin Wang <fefe.wyx@gmail.com>
+* Oleksandr Tyshkovets <olexandr.tyshkovets@gmail.com>
+* Àlex Magaz Graça <rivaldi8@gmail.com>
+
+### Other Contributors
+The following (incomplete list of) people (in no particular order) contributed (patches and translations) to GnuCash Android:
+* Christian Stimming <christian@cstimming.de>
+* Cristian Marchi <cri.penta@gmail.com>
+* Menelaos Maglis <mmaglis@metacom.gr>
+* Kjell Thomas Pedersen <kjelltp@gmail.com>
+* Alexander Galanin <al@galanin.nnov.ru>
+* Jorge Martínez López <jorgeml@gmail.com>
+* Israel Buitron <israel.buitron@gmail.com>
+* Geert Janssens <janssens-geert@telenet.be>
+* Nicolas Barranger <wicowyn@gmail.com>
+* Sigurd Gartmann <sigurdga-github@sigurdga.no>
+* Pedro Abel <pedroabel@gmail.com>
+* windwarrior <lennartbuit@gmail.com>
+* Alex Lei <lxbzmy@gmail.com>
+* Matthew Hague <matthewhague@zoho.com>
+* Spanti Nicola <rydroid_dev@yahoo.com>
+* Jesse Shieh <jesse.shieh.pub@gmail.com>
+* Terry Chung <terrywmc@gmail.com>
+* Caesar Wirth <cjwirth@gmail.com>
+* Alceu Rodrigues Neto <alceurneto@gmail.com>
+
+Please visit https://crowdin.com/project/gnucash-android for a more complete list of translation contributions

README.md

@@ -65,8 +65,8 @@ It will build the project for you and install it to the connected Android device
 The app is configured to allow you to install a development and production version in parallel on your device.
 
 ### With Android Studio
-The easiest way to build is to install [Android Studio](https://developer.android.com/sdk/index.html) v1.+
-with [Gradle](https://www.gradle.org/) v2.4.
+The easiest way to build is to install [Android Studio](https://developer.android.com/sdk/index.html) v2.+
+with [Gradle](https://www.gradle.org/) v2.10
 Once installed, then you can import the project into Android Studio:
 
 1. Open `File`
@@ -85,7 +85,7 @@ Google+ Community: https://plus.google.com/communities/104728406764752407046
 There are several ways you could contribute to the development.
 
 * One way is providing translations for locales which are not yet available, or improving translations.
-See this [blog post](http://www.codinguser.com/2012/09/gnucash-for-android-beta-2-lost-in-translation/) for some guidelines.
+Please visit [CrowdIn](https://crowdin.com/project/gnucash-android) in order to update and create new translations
 
 * You could as well contribute code, fixing bugs, new features or automated tests. Pull requests are always welcome.
 Take a look at the [bug tracker](https://github.com/codinguser/gnucash-android/issues?state=open)

app/build.gradle

@@ -1,13 +1,14 @@
-import java.text.SimpleDateFormat
 import org.apache.tools.ant.taskdefs.condition.Os
 
+import java.text.SimpleDateFormat
+
 apply plugin: 'com.android.application'
 apply plugin: 'io.fabric'
 
 def versionMajor = 2
 def versionMinor = 1
 def versionPatch = 0
-def versionBuild = 5
+def versionBuild = 6
 
 def buildTime() {
     def df = new SimpleDateFormat("yyyyMMdd HH:mm 'UTC'")