Makes maven dependencies de- and installable

Provides a new configuration `mods` which can be used on Maven Artifacts. That way, we can install them without affecting them on runtime (less load time)

Put the optional tasks into `optional.gradle` where a install task is just a copy task and the deinstall task a delete task

Added maven local to the repositories, if for some reason somebody uses a local maven

gradle.properties

@@ -11,7 +11,23 @@ minecraft_version=1.7.10
 forge_version=10.13.2.1291
 
 #########################################################
-# APIs used for development                             #
+# Installable                                           #
+#########################################################
+waila_version=1.5.10
+jabba_version=1.2.1a
+enderstorage_version=1.4.7.33
+translocator_version=1.1.1.14
+ic2_version=2.2.717
+enderio_version=2.3.0.375_beta
+#cofhlib_version=1.0.1-157
+#cofhcore_version=3.0.2-270
+#texpansion_version=4.0.0-176
+#tfoundation_version=1.0.0-82
+betterstorage_version=0.11.3.123.20
+invtweaks_version=1.59-dev-3
+
+#########################################################
+# Provided APIs                                         #
 #########################################################
 fmp_version=1.1.1.324
 code_chicken_lib_version=1.1.3.127
@@ -20,21 +36,22 @@ nei_version=1.0.4.90
 bc_version=6.4.6
 
 #########################################################
-# API Stubs                                             #
+# Self Compiled APIs                                    #
+#########################################################
+mekansim_version=8.0.1.198
+rotarycraft_version=V5c
+
+
+#########################################################
+# Self Compiled API Stubs                               #
 # Note: Do not edit these version numbers as they are   #
 # not the version of the mod, but stub code for AE2 to  #
 # compile                                               #
 #########################################################
-api_betterstorage_version=1
 api_coloredlightscore_version=1
 api_craftguide_version=1
-api_ic2_version=1
 api_immibis_version=1
-api_invtweaks_version=1
-api_mekansim_version=1.7.10-8.0.1.198
 api_mfr_version=1
 api_railcraft_version=1
 api_rblocks_version=1
 api_rf_version=2
-api_rotarycraft_version=V5c
-api_waila_version=1.5.10_1.7.10